Name: Date: 1. car accelerates uniformly from rest to a speed of 10 meters per second in 2 seconds. The acceleration of the car is 1.. 0.2 m/sec 2. 5 m/sec 2 C. 10 m/sec 2 D. 20 m/sec 2 2. steel ball is dropped from a height of 100 meters. The velocity of the ball after one second is 10 meters per second. What is the velocity of the ball after 2 seconds? 2.. 10 m/sec. 20 m/sec C. 40 m/sec D. 400 m/sec 3. The diagram here shows a 1-kilogram stone being dropped from a bridge 100 meters above a gorge. 3. Which graph of distance traveled versus time represents the motion of the freely falling stone?.. C. D. page 1
4. stone weighing 5 newtons falls freely from a cliff 44 meters high. The stone is accelerated at approximately 4.. 5 m/sec 2. 10 m/sec 2 C. 44 m/sec 2 D. 220 m/sec 2 5. Which velocity-time graph represents the motion of an object moving with constant acceleration? 5... C. D. 6. Which combination of graphs best describes free-fall motion? [Neglect air resistance.] 6.. and C. and D C. and D D. and C 7. Which is a vector quantity? 7.. distance. time C. speed D. acceleration page 2
8. The speed-time graph shown represents the linear motion of a cart. 8. Determine the magnitude of the acceleration of the cart during interval. [Show all calculations, including the equation and substitution with units.] 9. book weighing 20. newtons slides at constant velocity down a ramp inclined 30. to the horizontal as shown in the accompanying diagram. 9. What is the force of friction between the book and the ramp?. 10. N up the ramp. 17 N up the ramp C. 10. N down the ramp D. 17 N down the ramp 10. Net force F causes mass m 1 to accelerate at rate a. net force 3F causes mass m 2 to accelerate at rate 2a. What is the ratio of mass m 1 to mass m 2? 10.. 1 : 3. 2 : 3 C. 1 : 2 D. 1 : 6 page 3
11. Forces F 1 and F 2 act concurrently on point P, as shown in the accompanying diagram. 11. The equilibrant of F 1 and F 2 is. 14 N southwest. 14 N southeast C. 20. N southwest D. 20. N southeast 12. ase your answer(s) to the following question(s) on the information below. 12. 5.0-kilogram block weighing 49 newtons sits on a frictionless, horizontal surface. horizontal force of 20. newtons toward the right is applied to the block. [Neglect air resistance] On the diagram below, draw a vector to represent each of the three forces acting on the block. Use a ruler and a scale of 1.0 centimeter = 10. newtons. egin each vector at point C and label its magnitude in newtons. 13. Which combination of three concurrent forces acting on a body could not produce equilibrium? 13.. 1 N, 3 N, 5 N. 2 N, 2 N, 2 N C. 3 N, 4 N, 5 N D. 4 N, 4 N, 5 N 14. If a 30-newton force is required to accelerate a 2-kilogram object at 10 meters per second 2, over a level floor, then the magnitude of the frictional force acting on the object is 14.. 0 N. 10 N C. 20 N D. 30 N page 4
15. The accompanying diagram shows a child pulling a 50.-kilogram friend on a sled by applying a 300.-newton force on the sled rope at an angle of 40. with the horizontal. 15. The vertical component of the 300.-newton force is approximately. 510 N. 230 N C. 190 N D. 32 N 16. The accompanying diagram shows a block on a horizontal frictionless surface. 100.-newton force acts on the block at an angle of 30. above the horizontal. 16. What is the magnitude of force F if it establishes equilibrium?. 50.0 N. 86.6 N C. 100. N D. 187 N 17. Which is a derived unit? 17.. meter. second C. kilogram D. newton 18. mosquito flying over a highway strikes the windshield of a moving truck. Compared to the magnitude of the force of the truck on the mosquito during the collision, the magnitude of the force of the mosquito on the truck is 18.. smaller. larger C. the same page 5
19. baseball player throws a ball horizontally. Which statement best describes the ball s motion after it is thrown? [Neglect the effect of friction.] 19.. Its vertical speed remains the same, and its horizontal speed increases.. Its vertical speed remains the same, and its horizontal speed remains the same. C. Its vertical speed increases, and its horizontal speed increases. D. Its vertical speed increases, and its horizontal speed remains the same. 20. The magnitude of the force that a baseball bat exerts on a ball is 50. newtons. The magnitude of the force that the ball exerts on the bat is 20.. 5.0 N. 10. N C. 50. N D. 250 N page 6
cces format version 4.4.158 c 1997 2011 Educide Software Licensed for use by Problem-ttic Midterm Review 12/17/2012 1. 14. 2. 15. C 3. 16. 4. 17. D 5. 18. C 6. 7. 8. D a = v 40 m/s t = 20 s = 2 m/s 2 19. 20. D C 9. 10. 11. 12. 13.