Introductory Physics Multiple Choice Questions PDF 1435-36 (2014-15)
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Taibah University
Various Physics Teachers at Taibah University
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This document contains multiple choice questions from the Introductory Physics course at Taibah University. The questions cover topics such as formulas, constants, key terms, and scientific definitions. The paper is from the 1435-36 (2014-15) academic year.
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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
