Introductory Physics Multiple Choice Questions PDF 1435-36 (2014-15)

INTRODUCTORY PHYSICS MULTIPLE CHOICE QUESTIONS PREPARED BY: VARIOUS PHYSICS TEACHERS AT TAIBAH UNIVERSITY’S PREP YEAR PROGRAM 1435-36 (2014-15)  CHAPTER 1: INTRODUCTION, MEASUREMENTS, UNITS Formulas & Const...

INTRODUCTORY PHYSICS MULTIPLE CHOICE QUESTIONS PREPARED BY: VARIOUS PHYSICS TEACHERS AT TAIBAH UNIVERSITY’S PREP YEAR PROGRAM 1435-36 (2014-15)  CHAPTER 1: INTRODUCTION, MEASUREMENTS, UNITS Formulas & Constants A=L×W A = π R2 Volume = c = 299,792,458 m/s 1 u = 1.6605 × 10-27 kg (Rectangle’s area) (Circle’s area) Area × Height (speed of light in vacuum) (atomic mass unit) 1 m/s = 3.6 km/h 1 giga (G) = 109 1 mega (M) = 106 1 kilo (k) = 103 1 centi (c) = 10-2 1 milli (m) = 10-3 1 micro (µ) = 10-6 1 nano (n) = 10-9 1 in. = 2.54 cm 1 ft = 12 in. 1 yd = 3 ft 1 mi =5280 ft 1 mi =1.61 km 1 L = 1000 cm3 Dimension of length: L Dimension of time: T Dimension of mass: M Key Terms & Definitions Accuracy ‫د َقة‬ Fact ‫حقيقة‬ Relationship ‫عالقة‬ Analysis ‫تحليل‬ Guess ‫تخمين‬ Rounding ‫تقريب‬ Base units ‫الوحدات األساسية‬ Hypothesis ‫فرضية‬ Science ‫علم‬ Concept ‫مفهوم‬ Law ‫قانون‬ Scientific attitude ‫المنهج العلمي‬ Conversion ‫تحويل‬ Measurement ‫قياس‬ Scientific method ‫الطريقة العلمية‬ Data ‫بيانات‬ Model ‫نموذج‬ Scientific notation ‫الترميز العلمي‬ Decimal place ‫منزلة عشرية‬ Observation ‫مالحظة‬ SI System ‫نظام الوحدات العالمي‬ Detect ‫يكشف‬ Order of magnitude ‫الترتيب المقداري‬ Significant figures ‫األرقام المعنوية‬ Diameter ‫قطر دائرة‬ Percentage ‫نسبة مئوية‬ Speculation ‫تأمّل‬ Digit ‫منزلة رقمية‬ Phenomenon ‫ظاهرة‬ Standard ‫معيار‬ Dimension ‫بعد‬ Power-of-ten ‫أس العشرة‬ Technology ‫تقنية‬ Equation ‫معادلة‬ Precision ‫ضبط‬ Test ‫اختبار‬ Estimate ‫تقدير‬ Prediction ‫توقع‬ Theory ‫نظرية‬ Evidence ‫دليل‬ Prefix ‫أداة بادئة‬ Uncertainty ‫هامش الخطأ‬ Experiment ‫تجربة‬ Principle ‫مبدأ‬ Unit ‫وحدة‬ D misunderstand (‫)يسيء الفهم‬ Science; Scientific Method; Scientific Attitude 4. The scientific method does NOT include: 1. The test of truth in science is: A hypothesis (‫)فرضية‬ A experiment B speculation (‫)تأمل‬ B speculation C experiment (‫)تجربة‬ C hypothesis D prediction (‫)توقع‬ D facts 5. A scientific hypothesis is: 2. Good science is distinguished (‫ )يتميز‬by: A an experiment (‫)تجربة‬ A inconsistency (‫)عدم التوافق‬ B a final conclusion (‫)خالصة‬ B emotion (‫)العاطفة‬ C an educated guess (‫)تخمين مدروس‬ C imagination (‫)الخيال‬ D a verified prediction (‫)توقع محقق‬ D measurements (‫)القياس‬ 6. A scientific hypothesis: 3. Our ability to measure something indicates ( ‫يشير‬ A is always true ‫ )إلى‬how well we _______ that thing. B is always false A like C can be tested for falsehood B ignore (‫)يجهل‬ D is not important in science C know Chapter 1: Introduction, Measurements, Units 1 7. The three main elements of a scientific method are: D geology (‫)علم طبقات األرض‬ A hypothesis, prediction, conclusion 15. The most basic science is: B hypothesis, conclusion, speculation A physics C speculation, hypothesis, experiment B chemistry D hypothesis, prediction, experiment C biology 8. Of the following, the only scientific hypothesis is: D geology A souls (‫ )األرواح‬move faster than light 16. Physics is considered the basic science because: B atoms are the smallest particles in the world A it is most related to our daily experience C Einstein was the greatest scientist ever B all other sciences depend on it D space is filled with undetectable (‫ )غير مكتشف‬matter C it is needed for understanding other sciences 9. Which of these is NOT a scientific hypothesis? D all of these A atomic nuclei are the smallest particles in nature B a magnet will pick up a copper coin Models, Theories, and Laws C cosmic rays cannot penetrate a physics textbook D sound is made of untestable waves 17. A scientific model helps in _________ some scientific phenomena (‫)ظواهر‬. 10. A nonscientific hypothesis is: A rejecting (‫)رفض‬ A an electron is heavier than a proton B changing B heavy objects fall faster than light objects C understanding C sunset helps poetry D combining (‫)دمج‬ D the Moon is farther than the Sun 18. A scientific model relates (‫ )ينسب‬a difficult-to-see 11. Which of these is NOT a scientific hypothesis? scientific phenomenon (‫ )ظاهرة‬to something that is: A protons carry electric charge A unfamiliar to us B undetectable particles exist in the nucleus B ambiguous (‫)غامض‬ C charged particles bend in a magnetic field C not discovered (‫ )يكتشف‬yet D electricity can travel in plastic D familiar to us 12. Characteristics (‫ )خصائص‬of the scientific attitude 19. The picture that a scientific model gives for a include: studied phenomenon (‫ )ظاهرة‬is: A inquiry (‫)استطالع‬, integrity (‫)نزاهة‬, humility A approximate (‫)تقريبي‬ B inquiry, integrity, pride (‫)كبرياء‬ B exact (‫)دقيق‬ C submission (‫)تسليم‬, integrity, humility (‫)تواضع‬ C unclear (‫)غير واضح‬ D submission, inquiry, pride D reverse (‫)معكوس‬ 20. An agreement (‫ )توافق‬by competent (‫ )أكفاء‬scientists Physics vs. Other Sciences is a scientific: A hypothesis (‫)فرضية‬ 13. The physical sciences include: B fact (‫)حقيقة‬ A biology (‫)علم األحياء‬ C observation (‫)مالحظة‬ B botany (‫)علم النبات‬ D model (‫)نموذج‬ C entomology (‫)علم الحشرات‬ D geology (‫ )علم طبقات األرض‬ 21. A hypothesis that has been repeatedly (‫)تكرارا‬ tested without flaws (‫ )خلل‬becomes a scientific: 14. The physical sciences do NOT include: A prediction (‫)توقع‬ A chemistry B observation (‫)مالحظة‬ B zoology (‫ )علم الحيوان‬ C law (‫)قانون‬ C astronomy (‫)علم الفلك‬ D experiment (‫)تجربة‬ Chapter 1: Introduction, Measurements, Units 2 22. A synthesis (‫ )تجميع‬of many well-verified (‫)محقق‬ A 0.1 mm hypotheses (‫ )فرضيات‬is a scientific: B 1 mm A prediction (‫)توقع‬ C 2.5 mm B theory (‫)نظرية‬ D 5 mm C law (‫)قانون‬ 30. Using a ruler with cm and mm divisions to D experiment (‫)تجربة‬ measure a certain length, we get a value of 12.8 cm. 23. In science, a theory is: Our measurement can then be written as: A an educated guess A L = 12.8 ± 1.0 cm B less correct than a fact B L = 12.8 ± 0.01 cm C a synthesis (‫ )تجميع‬of many well-tested hypotheses C L = 12.8 ± 0.2 cm D unchangeable D L = 12.8 ± 0.1 cm 24. A scientific fact is rejected (‫ )يرفض‬if scientists find 31. Using a ruler with cm and mm divisions to that it: measure a certain length, we get a value of 12.8 cm. Our measurement can then be written as: A is disproved (‫ )ينقض‬by evidence (‫)أدلة‬ A L = 12.8 cm ± 1% B has become more than 500 years old B L = 12.8 cm ± 5% C disagrees with local politics C L = 12.8 cm ± 10% D actually, a fact is always a fact D L = 12.8 cm ± 20% 25. The equations F = ma is an example of a physics: 32. The percent uncertainty in the measurement A theory L = 20.2 ± 0.4 cm is: B model A 0.5% C law B 1% D prediction C 2% D 4% Uncertainty, Accuracy, and Precision 33. The percent uncertainty in a measurement 26. When are measurements absolutely (‫ )تماما‬precise? A = 2.03 m2 is: A usually A 0.5% B sometimes B 2% C always C 5% D never D 10% 27. There is uncertainty associated with every: 34. A scale (‫ )ميزان‬has ± 0.05 g accuracy. Weighing a A measurement diamond (‫ )ماسة‬on it gives 8.17 g one day and 8.09 g another day. These two measurements: B law A are unacceptable within the scale’s accuracy C equation B are acceptable within the scale’s accuracy D principle C prove that the scale’s accuracy is incorrect 28. Main causes of uncertainty in measurements are D prove that these are two different diamonds limitations (‫ )محدودية‬in: A instruments’ accuracy and experiment time 35. The ability of an instrument (‫ )جهاز‬to repeatedly (‫ )تكرارا‬give close (‫ )متقارب‬measurements is called: B instruments’ (‫ )أجهزة‬accuracy and human ability A accuracy C experiment time and human ability B uncertainty D experiment time and lab conditions C deviation 29. When we use a ruler of 1 millimeter smallest D precision divisions, the uncertainty is approximately (‫)تقريبا‬ equal to: 36. The ability of an instrument (‫ )جهاز‬to give Chapter 1: Introduction, Measurements, Units 3  measurements close (‫ )مقارب‬to the true values is A + B) should be the same as the ______ accuracy of called: A and B. A accuracy A most (‫)أكثر‬ B uncertainty B least (‫)أقل‬ C deviation C average (‫)متوسط‬ D precision D inverse (‫)عكسي‬ 44. Taking accuracy into account, the difference D = Significant Figures A – B between two numbers, A = 3.6 and B = 0.57, is correctly written as: 37. The number of reliably (‫ )بشكل موثوق‬known digits A 3.03 (‫ )أرقام‬in a number is its: B 3.00 A uncertainty C 3.003 B accuracy D 3.0 C significant figures D percent error 45. Taking accuracy into account, the sum S = A + B of two numbers, A = 3.6 and B = 0.40, is correctly 38. The number of significant figures in (23.20) is: written as: A 1 A 4.0 B 2 B 4.00 C 3 C 4 D 4 D 04. 39. The number of significant figures in (0.062) is: 46. Taking significant figures into account, the product A 1 P = A × B of two numbers, A = 12.0 and B = 12, is correctly written as: B 2 A 144 C 3 B 140 D 4 C 150 40. The number of decimal places in (0.062) is: D 100 A 1 47. Taking significant figures into account, the B 2 quotient Q = A ÷ B of two numbers, A = 12.0 and B C 3 = 12, is correctly written as: D 4 A 1.00 41. The area of a (10.0 cm × 6.5 cm) rectangle is B 1 correctly given as: C 1.0 A 65 cm2 D 1.000 B 65.0 cm2 48. Dividing 2.0 by 3.0 with a calculator gives C 65.00 cm2 0.66666666. Taking significant figures into account, D 65.000 cm2 this result should be written as: A 0.7 42. The significant figures in the product of two numbers (P = A × B) should be the same as the B 0.6667 ______ significant figures of A and B. C 0.667 A most (‫)أكثر‬ D 0.67 B least (‫)أقل‬ 49. For A = 0.01234, B = 0.00123, and C = 0.00012, C average (‫)متوسط‬ the number with the most significant figures is: D inverse (‫)عكسي‬ A A only 43. The accuracy in the sum of two numbers (S = B B only Chapter 1: Introduction, Measurements, Units 4 C C only A 3.70 D they all are the same B 0.37 C 37.0 50. For A = 0.01234, B = 0.00123, and C = 0.00012, the number with the most decimal places is: D 0.037 A A only 58. The decimal form for 7.62 × 102 is: B B only A 7.62 C C only B 762 D they all are the same C 76.2 D 0.762 Scientific Notation 59. The decimal form for 6.150 × 10-4 is: 51. Scientific notation allows the number of significant A 0.0615000 figures to be: B 0.0061500 A clearly expressed C 0.0006150 B carefully hidden D 0.0000615 C neglected 60. Taking significant figures into account, the product D avoided P = A × B of two numbers, A = 2.079 × 102 and B = 52. In the scientific notation, 36900 is written as: 0.072 × 10-1, is correctly written as: A 3.69 × 103 A 1.49688 B 3.69 × 104 B 1.497 C 36.9 × 103 C 1.5 D 0.369 × 104 D 1.50 53. The scientific notation for 325 is: 61. For A = 3.69 × 104, B = 3.690 × 102, and C = 3.6900 × 10-3, the number with the most significant A 3.25 × 102 figures is: B 3.25 × 101 A A only C 32.5 × 100 B B only D 32.5 × 10-1 C C only 54. In the scientific notation, 0.0021 is written as: D they have same number of significant figures A 21 × 10-2 B 2.1 × 10-3 Units & Standards C 21 × 10-3 62. A standard is a fixed reference (‫ )مرجع‬for a: D 2.1 × 10-4 A model 55. The scientific notation for 7.33 is: B equation A 7.33 × 102 C law B 7.33 × 101 D unit C 7.33 × 100 63. The standard of the meter is the distance traveled D 7.33 × 10-1 by light in vacuum in 1/299792458 of a(an): 56. The number 3.69 × 102 is equivalent to: A hour A 369 B second B 36.9 C minute C 3.69 D day D 0.369 64. The old standard of the second was 1/86400 of an -1 57. The number 3.7 × 10 is equivalent to: average solar (‫)شمسي‬: Chapter 1: Introduction, Measurements, Units 5 A hour D 0.00001 g B minute 72. Of the following SI units, the only base unit is: C day A newton D year B watt 65. The new standard of the second is defined in terms C gram of the frequency of radiation (‫ )إشعاع‬emitted by: D ampere A electronic devices 73. Of the following SI units, the only derived (‫)مشتق‬ B the sun unit is: C X-rays A volt D cesium atoms B kilogram 66. The standard of the kilogram, kept at the Bureau of C kelvin weights and Measures in France, is a cylinder of: D meter A platinum-iridium 74. A time interval of 60.0 µs is equal to: B gold-silver A 0.0600 s C wood-iron B 0.00600 s D radium-uranium C 0.000600 s 67. The SI unit of mass is the: D 0.0000600 s A newton 75. An electric current of 3 × 10-9 A is equal to: B kilogram A 3 µA C pound B 3 MA D gram C 3 nA 68. Which of the following is NOT an SI unit? D 3 mA A newton B kilogram Unit Conversion C pound D ampere 76. Converting 215 cm to meters gives: A 0.0215 m SI Prefixes & Base Units B 0.215 m C 21.5 m 69. The SI abbreviation for 36 centimeters is: D 2.15 m A 36 centim 77. A distance of 0.05 km is equal to: B 36 cmeter A 5000 cm C 36 cm B 500 cm D 36 centimeters C 50000 cm 70. 1 Mm (mega-meter) equals: D 500000 cm A 1000 m 78. A length of 286.6 mm is equal to: B 1000 km A 28.66 cm C 1000000 km B 286.6 cm D 100000 m C 2.866 m 71. 1 µg (microgram) equals: D 0.00286 µm A 0.0000001 g 79. Convert 84 in. to feet: B 0.0001 g A 5 ft C 0.000001 g B 6 ft Chapter 1: Introduction, Measurements, Units 6 C 7 ft B 3000 L D 8 ft C 300 L D 3L 80. Convert 15 miles to the nearest kilometers: A 18 km 88. One light year is: B 24 km A the speed of light in vacuum C 33 km B the time that sunlight takes to reach the Moon D 42 km C the distance light travels in 1 year D the time that sunlight takes to reach the Earth 81. Convert 258 cm2 to m2: A 0.0258 m2 89. If there are 3 × 107 seconds in one year, a distance B 0.258 m2 of one light year is equal to: C 2.58 m2 A 9 × 1015 m D 25.8 m2 B 9 × 1013 m C 9 × 1011 m 82. Convert 0.65 cm3 to mm3: D 9 × 109 m A 6500 mm3 B 6.5 mm3 Order of Magnitude; Estimation C 65 mm3 D 650 mm3 90. Rounding (‫ )تقريب‬a number to one digit multiplied by its power-of-ten gives its: 83. A distance of 10 ft is equal to: A precision A 305 m B accuracy B 305 cm C uncertainty C 30.5 cm D order of magnitude D 30.5 m 91. The 14 highest peaks in the world are between 84. Express 10 in. in centimeters: 8000 m and 9000 m high. The order-of-magnitude of A 0.254 cm their height (‫ )ارتفاع‬is: B 254 cm A 1 × 104 m C 25.4 cm B 0.1 × 104 m D 2.54 cm C 2 × 104 m D 10 × 104 m 85. Convert 2 h 15 min to seconds: A 8100 s 92. A lake (‫ )بحيرة‬is roughly (‫ )تقريبا‬circular, with a 1- B 2100 s km diameter and 10-m average depth (‫)عمق‬. Its water capacity can be estimated as: C 5900 s A 1 × 106 m3 D 3500 s 3 B 1 × 107 m3 86. A school speed-zone (‫ )نطاق‬is 30 km/h. Three cars C 1 × 108 m3 A, B, and C are going at speeds vA = 8 m/s, vB = D 1 × 109 m3 9 m/s, and vc = 10 m/s. The cars that will receive speeding tickets are: 93. The thickness (‫ )سماكة‬of a 200-page book is 1.0 cm. A A, B, and C The thickness of one sheet of this book can be B C only estimated as: C B and C A 0.001 mm D none B 0.01 mm C 0.1 mm 87. The maximum capacity in liters of a 3-m3 water tank (‫ )خزان‬is: D 1 mm A 30 L 94. If an average human lives for 70 years, and if the Chapter 1: Introduction, Measurements, Units 7  heartbeat rate is 80 beats/min, the number of B L M T-2 heartbeats in a lifetime can be estimated as: C L3 M2/T2 A 3 × 106 D L2 M T-1 B 3 × 107 98. The dimensions of acceleration are: C 3 × 108 A LT D 3 × 109 B L T-2 C L3/T2 Dimensions D L2 T-1 95. The dimensions of area are: 99. The dimensions of momentum (p = mv) are: A L2 T A LMT B L2  B L M T-2 C L3/T2 C L M T-1 D L2 T-1 D L2 M T-1 96. The dimensions of volume are: 100. Which of the following is dimensionally A L3  correct? B L2 A speed = acceleration / time C L3/T2 B distance = speed / time D L2 T-1 C force = mass × acceleration 97. The dimensions of force are: D density = mass × volume A LMT Chapter 1: Introduction, Measurements, Units 8  CHAPTER 2: MOTION & ENERGY Formulas & Constants Average speed: vf = vi + g.t d = ½ a.t2 + vi.t ΣE = constant ̅ v = g.t (vi =0) d= ½ g.t2 (vi = 0) (energy consrv.) F = m.a w = m.g W = F.d P=W/t KE = ½ m.v2 PE = m.g.h w = m.g W = F.d P=W/t KE = ½ m.v2 PE = m.g.h Vf = √ FA on B = FB on A R2 = X2 + Y2 tan θ = Y / X 1 m/s = 3.6 km/h g = 10 m/s2 1 hp = ¾ kW Key Terms & Definitions Acceleration ‫تسارع‬ Horizontal ‫أفقي‬ Resultant ‫محصّلة‬ Action ‫فعل‬ Inertia ‫القصور الذاتي‬ Reaction ‫ردة فعل‬ Air resistance ‫مقاومة الهواء‬ Instantaneous ‫لحظي‬ Resolution ‫تحليل‬ Average ‫متوسط‬ Interaction ‫تفاعل‬ Speed ‫السرعة القياسية‬ Component ‫ م َُر ِّكب‬/‫ ُم َكوِّ ن‬/‫عنصر‬ Kinetic energy ‫الطاقة الحركية‬ Static ‫سكوني‬ Direction ‫اتجاه‬ Mass ‫كتلة‬ Support force ‫قوة الدعم‬ Displacement ‫إزاحة‬ Magnitude ‫مقدار‬ Tension ‫توتر‬ Distance ‫مسافة‬ Mechanical ‫ميكانيكي‬ Terminal speed ‫السرعة الحدية‬ Dynamic ‫حركي‬ Motion ‫حركة‬ Vector ‫كمية متجهة‬ Energy ‫طاقة‬ Net force ‫ صافية‬/ ‫قوة إجمالية‬ Velocity ‫السرعة المتجهة‬ Equilibrium ‫اتزان‬ Normal force ‫القوة العمودية‬ Vertical ‫رأسي أو عمودي‬ Force ‫قوة‬ Potential energy ‫طاقة الوضع‬ Volume ‫حجم‬ Free fall ‫سقوط حر‬ Power ‫قدرة‬ Weight ‫وزن‬ Friction ‫احتكاك‬ Projectile ‫قذيفة أو مقذوف‬ Work ‫شغل‬ Gravity ‫جاذبية‬ Projection ‫إسقاط‬ A velocity Vectors B distance 1. Scalar is a quantity that does not need: C speed A value D time B magnitude 5. For linear motion, the angle between the velocity and C direction acceleration vectors is: D unit A always 0 o 2. Vector is a quantity that needs: B always 180o A direction only C 0 o or 180o B magnitude only D always 90o C unit only 6. Adding two perpendicular vectors (⃗ ) and (⃗ ) gives a D magnitude and direction resultant (⃗ ) with magnitude: 3. Example of a scalar is: A R=√  A velocity B R = A2 + B 2 B distance C R=√ C acceleration D R=1/√ D force 7. Two perpendicular forces, F1 = 40 N and F2 = 30 N, 4. Example of a vector is: act on a brick. The magnitude of the net force (Fnet) on the brick is: Chapter 2: Motion & Energy 9 A 70 N C mass B 50 N D height C 0N 14. The speed at a specific moment is called __________ D 10 N speed: 8. If an airplane heading north with speed vP = 400 A average km/h faces a westbound wind (‫ )ريح نحو الغرب‬of B instantaneous  speed vA = 300 km/h, the resultant velocity of the C initial plane (⃗ ) is: D final A 500 km/h, north-west B 700 km/h, north-east 15. Acceleration is the rate of change in: C 500 km/h, north-east A force D 700 km/h, north-west B distance C speed 9. Decomposing (or resolving) a vector (⃗ ) into two D velocity components in perpendicular directions (Ax and Ay) gives : 16. If the speed is constant, the acceleration must be: A Ax + Ay = A A constant B Ax + Ay = A2 B zero C Ax2 + Ay2 = A C negative D Ax2 + Ay2 = A2 D unknown 17. A car moves along a straight road with constant Linear Motion, Velocity, Acceleration acceleration. If its initial and final speeds are vi = 10 m/s, vf = 20 m/s, its average speed is: 10. To calculate an object’s average speed we need to A 12 m/s know the: B 15 m/s  A acceleration and time C 10 m/s B velocity and time D 20 m/s C distance and time  D velocity and distance 18. If an object in linear motion moves a distance of 20 m in 5 seconds, its average speed is: 11. A horse gallops (‫ )يجري‬a distance of 10 kilometers in A 4 m/s 30 minutes. Its average speed is: B 5 m/s A 15 km/h C 10 m/s B 20 km/h D 20 m/s C 30 km/h D 40 km/h 19. If an object is in linear motion, and its speed changes from 10 m/s to 20 m/s in 10 seconds, its acceleration 12. A car maintains for 10 seconds a constant velocity of is: 100 km/h due east. During this interval its A 20 m/s2 acceleration is: B 10 m/s2 A 0 km/h2 C 5 m/s2 B 1 km/h2 D 1 m/s2 C 10 km/h2 D 100 km/h2 20. If your average speed is 80 km/h on a 4-hour trip, the total distance you cover is: 13. While an object near Earth's surface is in free fall, its A 40 km ____________ increases: B 80 km A velocity  C 120 km B acceleration D 320 km Chapter 2: Motion & Energy 10 21. If you travel 300 km in 4 hours, your average speed D undefined is: 28. If an object is in free fall, its speed every seconds is: A 50 km/h A the same as the previous (‫ )السابق‬second B 75 km/h  B more than the previous second C 80 km/h C less than the previous second D 100 km/h D undefined Free Fall Newton’s 1st Law of Motion; Inertia; Equilibrium 22. If air resistance on a falling rock can be neglected, we say that this rock is: 29. If no external forces act on a moving object, it will: A heavy A continue moving at the same speed B at terminal speed B continue moving at the same velocity C in free fall C move slower and slower until it finally stops D light D make a sudden stop 23. If a stone drops in a free fall from the edge of a high 30. If an object is in mechanical equilibrium, we can say cliff, its speed after 5 seconds is: that: A 10 m/s A a nonzero net force acts on it B 40 m/s B it has constant velocity C 50 m/s C it has small acceleration D 100 m/s D it has large acceleration 24. If a stone drops in a free fall from the edge of a high 31. Inertia means that: cliff, the distance it covers after 4 seconds is: A an object at rest tries to remain at rest, and a moving A 40 m object tries to stop B 80 m  B an object at rest tries to move, and a moving object tries to stop C 120 m C an object at rest tries to move, and a moving object D 160 m tries to keep moving 25. If an object in free fall has an initial speed of 10 m/s, D an object at rest tries to remain at rest, and a moving its speed after 10 seconds is: object tries to keep moving A 80 m/s 32. The SI unit of inertia is the: B 90 m/s A kilogram C 100 m/s B newton D 110 m/s C joule 26. Neglecting air resistance, if a player throws a ball D none of these straight up with a speed of 30 m/s, the ball will reach its maximum height after: 33. If two equal forces act on a moving cart in opposite directions, we can say about it that: A 6 seconds A it has acceleration B 5 seconds B it is in static equilibrium C 4 seconds C it is in dynamic equilibrium D 3 seconds D nonzero net force acts on it 27. If an object is in free fall, the distance it travels every seconds is: 34. If two equal forces act on a stationary (‫ )ساكن‬book in opposite directions, we can say about it that: A the same as the previous (‫ )السابق‬second A it has acceleration B more than the previous second B it is in static equilibrium C less than the previous second Chapter 2: Motion & Energy 11 C it is in dynamic equilibrium A (14 N, east) D a nonzero net force acts on it B (14 N, west) C (2 N, west) 35. If you stand at rest on a pair of identical bathroom scales, the readings on the two scales will always be: D (-2 N, west) A each equal to your weight 42. Two forces act on an object: ⃗ = (10 N, up); ⃗ = (10 B each equal to half your weight  N, down). The net force (Σ⃗ ) on it is: C each equal to double your weight A (20 N, up) D different from each other B (20 N, down) 36. A man weighing 800 N stands at rest on two C (10 N, up) bathroom scales so that his weight is distributed D zero evenly between them. The reading on each scale is: A 400 N  43. Two forces act on a crate and the crate is in equilibrium. These two forces are: B 200 N A (100 N, right), (100 N, left)  C 1600 N B (100 N, right), (50 N, left) D 800 N C (50 N, right), (100 N, left) 37. A 80-kg painter stands on a 20-kg painting staging D (100 N, right), (100 N, right) (‫ )سقالة دهان‬that hangs on two ropes. If the staging is at rest and both ropes have the same tension, the tension 44. If the force of friction on a moving object is 10 N, in each rope is: the force needed to keep it at constant velocity is: A 200 N A 0N B 500 N B 5N C 800 N C 10 N D 1000 N D more than 10 N 45. When an object falling through air stops gaining Force; Support Force; Friction speed, we say that it has reached its __________ speed: 38. The support force is on an object results from the A average ____________ of atoms in the surface: B instantaneous A compression C final B speed D terminal C acceleration D energy 46. Air drag depends on a falling object’s: A size and speed 39. The support force on a 2-kg book lying on a level B size and density table is: C density and speed A 1N D none of these B 2N C 10 N D 20 N Mass; Weight 40. In the following, check the correct statement: 47. Mass is a measure of an object’s: A force is a vector, mass is a scalar A inertia B force is a vector, weight is a scalar B volume C mass is a vector, weight is a scalar C density D force is a vector, mass is a vector D speed 41. Two forces act on an object: ⃗ = (6 N, east); ⃗ = (8 48. Mass is an object’s quantity of: N, west). The net force (Σ⃗ ) on it is: A energy Chapter 2: Motion & Energy 12 B matter B 1 m/s2 C dimensions C 2 m/s2 D momentum D 5 m/s2 49. The SI unit for weight is the: 56. A 1-kg falling ball encounters 10 N of air resistance. A newton The net force on the ball is: B kilogram A 0 N C gram B 4N D pound C 6N D 10 N 50. Two identical barrels (‫)برميل‬, one filled with oil and one with cotton, should have: A same mass and different inertia Newton’s 3rd Law B same inertia and different weight 57. The number of forces involved (‫ )الداخلة‬in an C same volume and different mass interaction between two objects is: D same weight and different density A 0 51. If the Earth’s gravitational pull is 6 times that of the B 1 Moon, an object taken to the Moon will have: C 2 A same mass and less weight D 3 B same weight and less mass 58. A force is defined (‫ )تعريفها‬as: C same mass and same weight A part of an interaction between two objects D less mass and less weight B a push from an object on itself C a pull from an object on itself Newton’s 2nd Law D a push and a pull on the same object 52. An object’s acceleration is directly proportional to 59. Newton’s 3rd law states that, for two objects X and Y, the: whenever X exerts a force on Y, then: A net force A Y exerts double that force on X B average speed B Y moves in the opposite direction C mass C Y exerts half that force on X D inertia D Y exerts an equal but opposite force on X 53. If an object’s mass decreases while a constant force 60. In an interaction between two objects, the action and is applied to it, its acceleration: reaction forces are: A decreases A perpendicular B increases B in opposite directions C remains constant C in the same direction D changes according to volume D on the same object 54. If the net force acting on an object decreases, its 61. When a man pushes on a wall with force F, the wall acceleration: pushes back on him with force of magnitude: A decreases A zero B increases B F/2 C remains constant C F D changes direction D 2F 55. The net force on an 50-kg crate is 100 N, its 62. When a cannon shoots a cannonball with acceleration acceleration is: ab, the cannon recoils (‫ )يرتد‬with acceleration ac such A 0.5 m/s2 that: Chapter 2: Motion & Energy 13 A ac = ab B m/N B ac is much larger than ab C N/m C ac is much smaller than ab D N.m D ac = 0 70. A cart moves 10 m in the same direction as a 20-N 63. When a cannon shoots a cannonball with force Fb, force acting on it. The work done by this force is: the cannon recoils (‫ )يرتد‬with force Fc such that: A 200 J A Fc = Fb  B 2J B Fc is much larger than Fb C 0.5 J C Fc is much smaller than Fb D 20 J D Fc = 0 71. A man does 2000-J work in pushing a crate a 64. When a cannon shoots a cannonball, the cannon’s distance of 10 m on a frictionless floor. The force recoil (‫ )ارتداد‬is much slower than the cannonball applied by the man is: because: A 20 N A the force on the cannon is much less B 200 N B the mass of the cannon is much greater C 2000 N C the cannon’s mass is more distributed (‫)موزع‬ D 20000 N D there is more air resistance 65. When a man stretches a spring with a 100-N force Power (within its elasticity range), the spring pulls him back with: 72. An engine (‫ )محرك‬can do 100,000-J work in 10 s. The power of this engine is: A 0N A 1 MW B 50 N B 100 kW C 100 N C 1000 W D 200 N D 10 kW Work; Energy 73. An engine (‫ )محرك‬can do 75-kJ work in 10 s. The power of this engine in horsepower is: 66. Work is produced only if there is: A 10 hp A force and motion B 1 hp B force and elevation (‫)ارتفاع‬ C 0.1 hp C force and time D 100 hp D time and elevation 74. The SI unit of power is: 67. Work is proportional to: A newton A (force) and (1/distance) B watt B (force) and (distance) C joule C (1/force) and (distance) D ampere D (force) and (distance)2 75. A watt is equivalent to: 68. The SI unit of work is: A kg.m3/s2 A newton B kg2.m2/s3 B watt C kg.m2/s3 C joule D kg2.m2/s D ampere 76. Of the following quantities, the ones that have the 69. A joule is equivalent to: same unit are: A N/m2 A work and energy Chapter 2: Motion & Energy 14 B work and power A 1m C energy and power B 2 m D work and pressure C 4m D 8m Mechanical Energy 84. Three 5-kg rocks are raised to a height of 5 m, with Rock1 raised with a rope, Rock2 raised on a ramp 77. Mechanical energy results from an object’s: (‫)منحدر‬, and Rock3 raised with an lift (‫)مصعد‬. The A position only rock that attains the most potential energy is: B position and/or motion A Rock1 C motion only B Rock2 D neither position nor motion C Rock3 78. Mechanical energy consists of: D all the same A kinetic energy and power B potential energy and power Kinetic Energy C potential and kinetic energy 85. Kinetic energy is the energy stored in an object D power and work because of its: A motion Potential Energy B position C charge 79. Of the following, the form of energy that is NOT potential is the energy of: D mass A a moving car 86. The kinetic energy of a 1000-kg car traveling at a B a stretched bow (‫)قوس مشدود‬ speed of 20 m/s is: C a compressed spring (‫)زنبرك مضغوط‬ A 50 kJ D water in a high reservoir (‫)خزان‬ B 100 kJ C 200 kJ 80. Potential energy is the energy stored in an object because of its: D 400 kJ A speed 87. The mass of a bicycle of 4000-J kinetic energy B position traveling at 10 m/s is: C charge A 40 kg D mass B 50 kg C 60 kg 81. A 20-kg box rests on a 2-m high shelf. Its potential energy relative to the ground is: D 80 kg A 100 J 88. The speed of a 40-kg bicycle of 1620-J kinetic B 200 J energy is: C 400 J A 9 m/s D 800 J B 3 m/s C 27 m/s 82. The mass of a box of 200-J potential energy when resting on a 2-m-high shelf is: D 90 m/s A 10 kg 89. If an object’s speed doubles, its kinetic energy: B 20 kg A remains the same C 40 kg B doubles D 80 kg C triples 83. If a 5-kg box sitting on a shelf of height (h) has 100-J D quadruples potential energy relative to the ground, h equals: Chapter 2: Motion & Energy 15 90. If an object’s mass doubles while moving at a B decreases, decreases constant speed, its kinetic energy: C decreases, increases A remains the same D increases, increases B doubles 96. The ram of pile-driver (‫ ) ِمدَك‬falls from a height of C triples 20 m. Its speed just before touching ground is: D quadruples A 2 m/s 91. The kinetic energy of a car traveling at 20 m/s is B 5 m/s 500 kJ. If it travels at 40 m/s, its kinetic energy C 10 m/s becomes: D 20 m/s A 500 kJ B 1000 kJ 97. A simple pendulum’s bob has speed (v) at its lowest point (1); its highest point (3) has height (h). C 2000 kJ If h = 20 cm, v equals: D 4000 kJ A 2 m/s 92. The work done by the engine of a 1000-kg car to B 5 m/s move it from rest to a speed of 20 m/s is: C 10 m/s A 50 kJ D 20 m/s B 100 kJ C 200 kJ 98. When a simple pendulum’s bob of mass m = 0.5 kg is at its highest point (3), its height is h = 40 cm. Its D 400 kJ kinetic energy at its lowest point (1) is: 93. The force exerted by the engine of a 1000-kg car to A 0J move it from rest to a speed of 20 m/s within 100 m B 2 J is: C 5J A 1000 N D 10 J B 2000 N C 4000 N 99. When a simple pendulum’s bob of mass m = 0.5 kg is at its highest point (3), its height is h = 40 cm. Its D 5000 N kinetic energy at point (2) of height ½ h is: A 5J Conservation of Energy B 2J 94. The total energy of an object of mass (m), falling at C 1 J height (h) with speed (v) can be written as: D 0J A E = ½ mv2 + 2 mgh 100. When a simple pendulum’s bob of mass m = B E = ½ mv2 + mgh 0.5 kg is at its highest point (3), its height is h = 40 C E = mv2 + ½ mgh cm. Its total energy at point (2) of height ½ h is: D E = ½ mv2 + ½ mgh A 5J B 2 J 95. As an object falls, its potential energy __________ and its kinetic energy __________. C 1J D 0J A increases, decreases Chapter 2: Motion & Energy 16