First Term Exam Physics Gr10 2016-2017 PDF
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Uploaded by LuxuryCopper7876
STEM High School for Boys - 6th of October
2017
Science, Technology, Engineering and Mathematic Schools
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This is a physics exam paper from Science, Technology, Engineering and Mathematic Schools for grade 10, from the first term of 2016-2017. Questions cover velocity, force, and other mechanics topics.
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Science, Technology, Engineering and Mathematic Schools First Term Exam 2016 – 2017 Subject: Physics Grade 10 Time: 120 minutes Instructions Use Blue ink, ballpoint pen or pencil. Answer all ques...
Science, Technology, Engineering and Mathematic Schools First Term Exam 2016 – 2017 Subject: Physics Grade 10 Time: 120 minutes Instructions Use Blue ink, ballpoint pen or pencil. Answer all questions. Answer the questions in the spaces provided – there may be more space than you need. You need to ensure that you fill in the entire box like the example: Information You can use the BLANK PAGE at the end of the questions as draft papers. Candidates may use a scientific calculator. Advice Read each question carefully before you start to answer it. Keep an eye on the time. Try to answer every question. If you do not know the answer to a question, go on to the next question. You may come back to the skipped question later if you have time. Check your answers if you have time at the end. 1 LO 1.01 The car Its velocity ( V ) Car X VX = 90 kilometer/hour Car Y VY = 240 meter/ minute Car Z VZ = 15 meter / second Car T VT = 6 kilometer / minute Use the data table above to answer the following question: What is the correct ascending rank of the car's velocity ? A- VZ ˂ VX ˂ VY ˂ VT B- VT ˂ VY ˂ VX ˂ VZ C- VT ˂ VZ ˂ VX ˂ VY D- VY ˂ VX ˂ VZ ˂ VT 2 LO 1.01 The force of a magnetic field on a straight wire carrying current, is given by the formula of ( F = LIB ) where F is the force in Newton, I is the current intensity in coulomb/second, and L is the wire’s length in meter. What is the unit of the magnetic flux density ( B ) ? A- Newton / Sec. coulomb.meter B- Newton. Sec / coulomb.meter C- Newton. Sec. coulomb / meter D- Newton. Sec. coulomb.meter 3 LO 1.01 2 -1 2 -1 -3 Suppose A = B C , where A has the dimension M L T and C has the dimension M-1L3T. What is the dimension of B ? A- M1/2 L T-1 B- M-1 L-2 T1/2 C- M L1/2 T-2 D- M-2 L-1/2 T 4 LO 1.01 A cube whose side’s length ( L ) = 10 ± 0.4 cm. What is value of its volume? A- ( 1000 ± 0.12 ) cm3 B- ( 1000 ± 40 ) cm3 C- ( 1000 ± 120) cm3 D- ( 1000 ± 0.04) cm3 Physics _ Grade 10 Page 2 of 18 5 LO 1.01 The diameter of a wire being tested is measured as d = 0.40 ± 0.005 mm. What is the percentage uncertainty in the result of the calculation when d is used to determine cross sectional area of the wire? A- 2.50% B- 1.56% C- 1.25% D- 0.016% 6 LO 1.02 The figure above shows a girl holds an apple in her hand. If the action force is the force of the hand on the apple, What is the suitable sentence that describes the reaction force? A- The force of the apple on the earth. B- The force of the earth on the apple. C- The force of the apple on the hand. D- The force of the earth on the hand. 7 LO 1.02 A 50 kilogram football player kicks a 25 gram ball by a force of 25 Newton (N) towards east. What is the suitable sentence that describes that system? A- The ball kicks the player by a force of 50 N west. B- The ball kicks the player by a force of 50 N east C- The ball kicks the player by a force of 25 N east D- The ball kicks the player by a force of 25 N west 8 LO 1.02 How does Newton’s third law explain how a rocket takes off? The rocket’s acceleration is positive, while the gasses acceleration is A- negative but they have the same magnitude. The rocket pulls the earth by a force that equals to its weight causing B- taking off to the rocket The hot gasses move in one direction, while the rocket moves in the C- opposite direction but with equal force. The hot gases exert force less than the rocket ‘s weight causing taking D- off to the rocket. Physics _ Grade 10 Page 3 of 18 9 LO 1.02 The opposite graph represents action at the Y-axes, and reaction at X-axes, then… A- Reverse the axes will decrease the angle B- Reverse the axes will increase the angle C- By increasing the action the angle will increase D- By decreasing the action the angle will not change 10 LO 1.02 In the opposite figure and by considering the acceleration due to gravity = 10 m/s2. What is the magnitude of the box’s acceleration, and what is the magnitude of the vertical force? A- 4 meter/second2. 8.7 Newton. B- 4 meter/second2. 17.3 Newton. C- 8 meter/second2. 8.7 Newton. D- 8 meter/second2. 17.3 Newton. 11 LO 1.02 In the opposite figure, when the angle increase, it will affects the horizontal velocity F Vx, and vertical velocity VY, which of the following statement is right A- Vx: increases, the apparent weight of the body decreases B- Vy: increases, the apparent weight of the boy increases C- Vx: decreases, the apparent weight of the body decreases D- Vy: decreases, the apparent weight of the boy increases 12 LO 1.03 If a firefly collides with the windshield of a fast-moving bus, which statement is correct? A- The firefly experiences an impact force with a larger magnitude B- The bus experiences an impact force with a larger magnitude C- The firefly and bus experience forces with same direction D- The firefly and bus experience forces with same magnitude Physics _ Grade 10 Page 4 of 18 13 LO 1.03 A heavy weight is supported by two cables that exert tensions of magnitude T1 and T2. Which statement is correct? A- T1 = T2 B- T1y = T2y C- T1 < T2 D- T1 > T2 14 LO 1.03 The tension in a string from which a 4.0 kg object is suspended in an elevator is equal to 44 N. What is the acceleration of the elevator? A- 2.4 m/s2 upward B- 1.2 m/s2 upward C- 1.2 m/s2 downward D- 2.4 m/s2 downward 15 LO 1.03 A block is pushed across a horizontal surface by a force F with constant velocity. Given that F = 20 N, θ = 30°, and M = 10 kg. What is the magnitude of the horizontal acceleration of the block? A- 17.3 N B- 17.3 m/sec2 C- 1.7 N D- 1.7 m/sec2 Physics _ Grade 10 Page 5 of 18 16 LO 1.03 A ball is moving in a clockwise direction around a circle at constant speed. Which diagram correctly shows the directions of its velocity vector (v) and acceleration (a) when the ball is located at that point on the circle? a A- v a B- v v a C- v D- a 17 LO 1.03 An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the radius 1000 m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change? A- 0.25 B- 0.50 C- 1.00 D- 2.00 18 LO 1.03 A roller-coaster car has a mass of 500 kg when fully loaded with passengers. At the bottom of a circular dip of radius 40 m (as shown in the figure) the car has a speed of 16 m/s. What is the magnitude of the force of the track on the car at the bottom of the dip? A- 1.2 KN B- 3.2 kN C- 4.9 kN D- 10.7 kN Physics _ Grade 10 Page 6 of 18 19 LO 1.03 A stone is swung in a circle on a string as shown below. If the string breaks which arrow shows the path the stone will take? D C A B A- A B- B C- C D- D 20 LO 1.03 A car travels on a flat, circular track. Which factor, that when doubled, will decrease the centripetal force on the car by a factor of 2? A- mass of the car B- acceleration of gravity C- velocity of the car D- radius of the track 21 LO 1.03 An object moves in uniform circular motion, and the centripetal force on the object is 4.0 N. If the mass of the object decreases by a factor of 2, and the velocity increases by a factor of 2. What will be the centripetal force on the object? A- 32 N B- 16 N C- 12 N D- 8 N 22 LO 1.03 In the opposite figure, a satellite B is three times more massive than satellite A. Which satellite experiences a stronger gravitational attraction force with the Earth? A- Neither, since they are in space. B- Neither, they are at the same distance. C- Satellite A, since it is easier to move. D- Satellite B, since it has more mass. Physics _ Grade 10 Page 7 of 18 23 LO 1.03 A satellite revolves around a planet, then the same satellite revolves around another planet of double density and same mass as the first planet, which of the following is the most accurate description of its orbital velocity: A- Remains constant B- Increases C- Increases 4 times D- Increases 8 times 24 LO 1.04 A 3.0 kg block slides on a frictionless 20° inclined plane. A force of 16 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block? A- 2.0 m/s2 down the incline B- 5.3 m/s2 up the incline C- 2.0 m/s2 up the incline 2 D- 5.3 m/s down the incline 25 LO 1.04 If F = 40 N and M = 1.5 kg, what is the approximated tension in the string connecting M and 2M ? Assume that all surfaces are frictionless. A- 13 N B- 23 N C- 36 N D- 15 N 26 LO 1.04 In the opposite figure, If the first mass (m1) and the second mass (m2) are 7 kilogram and 3 kilogram respectively. What is the magnitude of the acceleration of the system, and what is the value of tension force in the cord? A- 25 m/s2. 173 Newton. B- 12 m/s2. 42 Newton. C- 4 m/s2. 42 Newton. D- 4 m/s2. 14 Newton. Physics _ Grade 10 Page 8 of 18 27 LO 1.04 A car is moving at uniform velocity. The forward driving force is 2000 N. The drag force due to air resistance and friction would be … A- Zero B- Less than 2000 N C- Greater than 2000 N D- Equal to 2000 N 28 LO 1.04 The opposite figure shows a block of mass 10 kilogram is released from rest and slides without friction down a plane inclined at an angle ( ) = 60 from the horizontal. What is the magnitude of the block's acceleration and what is the magnitude of the normal force that acts on the block? A- 8.5 m/s2. 37 Newton. B- 8.5 m/s2. 49 Newton. C- 7.4 m/s2. 49 Newton. D- 6.3 m/s2. 85 Newton. 29 LO 1.04 Distance in meters moved vs time in minutes is plotted for a car in traffic jam on a straight level road. Which interval had the greatest velocity? A- Before covering 30 m B- after 3 sec, and before 4 sec C- At a distance 40 m from the original position D- After 5 second 30 LO 1.04 Two objects attract each other gravitationally. If the distance between their centers is quartered , What will happen for the gravitational force? A- increases 4 times B- increases 8 times C- increases 12 times D- increases 16 times Physics _ Grade 10 Page 9 of 18 31 LO 1.04 The acceleration of gravity on the Moon is one-sixth what it is on Earth. An object of weight 720 Newton (N) is taken to the Moon. What is its mass there? A- 120 kg B- 72 kg C- 12 kg D- 6 kg 32 LO 1.04 The figure shows three blocks are in contact with each other on a frictionless, horizontal surface. A horizontal force F is applied to m1. If m1 = 2.00 kg, m2 = 3.00 kg, m3 = 4.00 kg, and F= 24.0N, What is magnitude of the force between blocks m1 and m2? And what is magnitude of the force between blocks m2 and m3? A- 24 Newton(N). 24 Newton(N). B- 19 N. 15 N. C- 19 N. 11 N. D- 5 N. 11 N. 33 LO 1.04 A body of mass 10 Kg is at rest at a table, considering gravitational acceleration is 10 m/sec2 then a force of 30 N, pull the body upwards, it leads to… A- The mass of the body will decreases B- The reaction of the table will decrease C- The body will move upwards with uniform velocity D- The body will move upward with uniform acceleration 34 LO 1.04 In the figure, if m1=2 kg , m2=6 kg , θ = 30 What is the magnitude of the acceleration of the system? A- 4.9 m/s2. B- 6.1 m/s2. C- 5.2 m/s2. D- 2.5 m/s2. Physics _ Grade 10 Page 10 of 18 35 LO 1.04 The gravitational force between two masses is 100 Newton (N). What is the gravitational force if the distance between them is halved? (G = 6.673 x 10–11 N.m2/kg2) A- 200 N B- 400 N C- 600 N D- 800 N 36 LO 1.04 The diagram shows two smaller planets of mass m and one larger planet of mass 4m, aligned and separated by distance (d) between each planet. Which one of the following gravitational forces is the strongest? X Y Z A- The force on Planet X by Planet Y. B- The force on Planet X by Planet Z. C- The force on Planet Y by Planet Z. D- The force on Planet Z by Planet X. 37 LO 1.04 The attraction force between two masses (m1) and (m2) of a distance (r) from each other can be calculated due to the relation , if m1 is replaced with another one of (2m1) it means: A- F increases and G increases B- F decreases and G decreases C- F increases and G remains constant D- F remains constant and G increases Physics _ Grade 10 Page 11 of 18 38 LO 1.05 In the shown diagrams: Diagram (1) shows two parallel forces (F) acting on a bar of length (l) pivoted at P. The forces create a couple of torque M. In diagram (2), the two parallel forces have each moved (l/4) to the left. What is the torque of the couple in diagram 2? A- M / 4 B- M / 2 C- M D- 2M 39 LO 1.05 The figure shows a weightless rod whose length is (1) meter (m) and two masses 360 gram (g) and 240 gram (g) are hanged to the two ends of the rod as shown. Where is the center of gravity of the group relative to the midpoint of the rod? 1 A- m from the left end 10 1 B- m from the right end 10 1 C- m from the left end 6 1 D- m from the right end 6 Physics _ Grade 10 Page 12 of 18 40 LO 1.05 A (200) Newton object is moved by a lever whose fulcrum is (1) meter from the object. The effort needed to move the object is exerted (2) meters on the other side of the fulcrum. What effort force was needed to move the object? A- 50 Newton B- 100 Newton C- 150 Newton D- 200 Newton 41 LO 1.05 The mechanical advantage of the lever depends on A- Length of the lever B- Position of the center of rotation C- Mass of the body D- Force acting on the lever 42 LO 1.05 A worker uses a pulley system to raise a 24.0 kg carton 16.5 m. A force of 129 N is exerted. What is the distance by which the rope is pulled ? A- 3.069 m B- 9.042 m C- 30.03 m D- 88.68 m 43 LO 1.05 in the opposite figure, the acceleration at Y-axes can by calculated by using the mathematical formula: A- ( ) B- ( ) C- ( ) D- ( ) Physics _ Grade 10 Page 13 of 18 44 LO 1.05 Where should you load passengers on a double-decker bus to make it most stable? A- On the top level of the bus B- On the bottom level of the bus C- In the front of the bus D- In the back of the bus 45 LO 1.05 According to the figure, what is the location of the center of mass? A- ( 0.25 , 0 ) m B- ( 0.75 , 0.25 ) m C- ( 1 , 0 ) m D- ( 0 , 0.75 ) m 46 LO 1.06 The figure shows an iron wire and a brass wire, of equal lengths and cross sectional area, are joined at one end. A tension force F is applied to the free ends as shown. If the Young modulus of iron is twice that of brass Which statement is true? A- The extension and strain of the iron wire is twice that of the brass wire. B- The extension and strain of the brass wire is twice that of the iron wire. C- The stress and strain of the brass wire is twice that of the iron wire. D- The stress and strain of the iron wire is twice that of the brass wire. 47 LO 1.06 Which of the following statement is true A- Stress depends on the kind of matter B- Stress is an external force acts per unit length C- Stress can measure by unit of N/m2 D- Stress can measure by unit of N/m Physics _ Grade 10 Page 14 of 18 48 LO 1.06 Which of the following statement is true A- For small stresses, strain is proportional to the stress B- For large stresses, strain is proportional to the stress C- Strain = elastic modulus x stress D- Strain = elastic modulus / stress 49 LO 1.07 The figure shows a light spring of constant k = 150 Newton/meter rests vertically on a table. A 100 gram balloon is filled with 1.35 kilogram hydrogen gas and is then connected to the spring, causing it to stretch by upwards buoyant force of 189.63 Newton as shown. What is the magnitude of the extension distance L when the balloon is in equilibrium.? Consider The acceleration due to gravity = 9.8 meter/second2 A- 1.17 m B- 2.23 m C- 3.36 m D- 4.48 m 50 LO 1.07 A 290 N force is used to compress a spring. The spring constant of the spring is 5,880 N/m. How far is the spring compressed? A- 0.0050 m B- 0.0493 m C- 0.310 m D- 20.275 m Physics _ Grade 10 Page 15 of 18 List of data, formulae and relationships Physics _ Grade 10 Page 16 of 18 BLANK PAGE Physics _ Grade 10 Page 17 of 18 BLANK PAGE Physics _ Grade 10 Page 18 of 18