Download Ch 5 Test Review

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Ch 5 Test Review
Indicate the answer choice that best completes the statement or answers the
question.
1. Which of the following best completes the phrase?
For every action there is _____.
a. a reaction
b. an equal reaction
c. an opposite reaction d. an equal and opposite reaction
2. Which of the following keeps a satellite in orbit?
a. frictional force
b. kinetic force
c. centripetal force d. acceleration force
3. A moving train car collides with another train car that is motionless on the track. The train
cars are the same size. How does the final momentum of the two cars compare to the
momentum of the first car?
a. It is the same. b. It is double.
c. It is half.
d. It is zero.
4. We are able to walk forward because _____.
a. we push on the air
b. we push on the ground
c. the air pushes on us d. the ground pushes on us
5. A student hits a nail with a hammer. During the collision, there is _____.
a. a force on the hammer but not on the nail
b. a force on the nail but not on the hammer
c. a force on the nail and also on the hammer
d. no force on either object in the collision
6. An unbalanced force acting on an object causes it to ____.
a. move at constant speed b. continue in a straight line
c. not change its velocity
d. accelerate
7. Which of the following is an example of an unbalanced force?
a. book sitting on a table
b. car sitting in the garage
c. person on an elevator going down
d. person leaning on a wall
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Ch 5 Test Review
8. An arrow can be used to represent a force. The length of the arrow represents _____.
a. direction of the force b. strength of the force
c. mass of the force
d. acceleration of the force
9. Forces that are equal in size but opposite in direction are ____.
a. balanced forces b. frictional forces
c. inertial forces
d. net forces
10. An object of large mass has _____ than an object of small mass.
a. less momentum b. more momentum
c. less weight
d. greater acceleration
11. A 300-N force acts on a 25-kg object. The acceleration of the object is ____.
a. 7,500 m/s2 b. 300 m/s2
c. 25 m/s2
d. 12 m/s2
12. Which of the following is the equation for momentum?
a.
b.
c.
d.
13. Which of the following is a force?
a. momentum
b. friction
c. acceleration d. velocity
14. When two birds are pulling on a worm and the worm moves toward the first bird, you know
that the forces are ____.
a. long-range
b. action-reaction
c. unbalanced d. balanced
15. A collision is considered elastic if _____.
a. the objects do not stick together
b. the objects that collide don’t get warmer
c. after the collision, the objects have the same shape as before the collision
d. All of the above.
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Ch 5 Test Review
16. The upward force on an object falling through the air is ____.
a. air resistance b. inertia
c. gravity
d. terminal velocity
17. The relationship among force, mass, and acceleration is stated in ____.
a. the law of conservation of momentum b. Newton's first law of motion
c. Newton's second law of motion
d. Newton's third law of motion
18. Unbalanced forces can make an object accelerate by _____.
a. changing its speed b. changing its direction
c. both a and b
d. neither a nor b
19. Which of the following is a force or motion that is involved in the Moon orbiting Earth?
a. a force pulling the Moon toward the center
b. a speed at right angles to the line from the mass of the Moon to the center of Earth
c. acceleration toward the center of Earth
d. all of the above
20. A skater slowing as she slides across the ice is an example of _____.
a. inertia
b. momentum
c. friction d. mass
21. Whenever an object exerts a force on another object, the second object exerts a force of the
same magnitude, but in the _____ direction to that of the first object.
a. opposite
b. same
c. right angle d. vertical
22. The force you have to overcome to start an object moving is ____.
a. rolling friction b. static friction
c. sliding friction d. air resistance
2
23. A 3,000-N force gives an object an acceleration of 15 m/s . The mass of the object is ____.
a. 45,000 kg b. 1,500 kg
c. 200 kg
d. 15 kg
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24. An object’s weight is _____ its mass.
a. equal to
b. less than
c. proportional to d. greater than
25. The unit of force is ____.
a. m/s
b. the hertz
c. the joule d. the newton
26. If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.
a. go straight up
b. travel horizontally
c. fall straight down d. follow a curved path
27. The statement "for every action, there is an equal but opposite reaction" is a statement of
____.
a. the law of conservation of momentum b. Newton's first law
c. Newton's second law
d. Newton's third law
28. Which of the following is NOT an example of circular motion?
a. car turning a corner
b. yo-yo on a string going in a circle
c. car accelerating onto highway
d. the Moon’s path around Earth
29. Which of the following is an example of a noncontact force?
a. musician playing piano
b. athlete hitting a ball with a bat
c. a ball falling after you toss it in the air
d. karate expert breaking a stack of wood
30. The force that opposes motion is ____.
a. a balanced force
b. an unbalanced force
c. an accelerating force d. friction
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Ch 5 Test Review
Answer Key
1. d
2. c
3. a
4. d
5. c
6. d
7. c
8. b
9. a
10. b
11. d
12. b
13. b
14. c
15. a
16. a
17. c
18. c
19. d
20. c
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21. a
22. b
23. c
24. c
25. d
26. b
27. d
28. c
29. c
30. d
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