Download Ch 3 Quiz (with KEY)

Name _________________________________
Period ________
Chapter 4 Quiz
1. A net force acting on a moving object causes the object to _____.
a. fall
b. accelerate
c. stop
d. curve
2. ____ is the only downward force acting on a freely falling object.
a. Inertia
b. Acceleration
c. Friction
d. Gravity
3. Which of these opposes acceleration of a falling object due to gravity?
a. momentum
b. air resistance
c. reaction force
d. terminal velocity
4. According to Newton's second law, acceleration depends on the size of the force and the
______ of an object.
a. mass
b. momentum
c. velocity
d. weight
5. What force causes a leaf to fall more slowly than a penny?
a. gravity
b. momentum
c. inertia
d. air resistance
6. Which best illustrates Newton's third law?
a. projectile motion
b. circular motion
c. rocket propulsion
d. centripetal force
7. The _____ velocity of a projectile is considered to be constant.
a. horizontal
b. circular
c. accelerated
d. vertical
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Name _________________________________
Period ________
8. An object in free fall can be considered _____.
a. moving horizontally
b. heavy
c. motionless
d. weightless
9. _____ is reached when air resistance and force due to gravity are equal in size.
a. Negative acceleration
b. Terminal velocity
c. Centripetal acceleration
d. Weightlessness
10. Which of the following does not affect the amount of air resistance that acts on an object?
a. mass
b. size
c. shape
d. speed
11. Acceleration toward the center of a curved or circular path is _____.
a. positive acceleration
b. negative acceleration
c. centripetal acceleration
d. zero acceleration
12. A motionless object has no _____.
a. mass
b. weight
c. momentum
d. inertia
13. What two forces are constantly acting on a satellite in Earth orbit?
a. friction and momentum
b. momentum and gravity
c. gravity and air resistance
d. inertia and gravity
14. Because of Earth's gravitational pull and their own inertia, projectiles follow _____ paths.
a. straight
b. curved
c. circular
d. upward
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Name _________________________________
Period ________
15. The momentum of a large bus is _____ that of a small car traveling at the same speed.
a. greater than
b. equal to
c. less than
d. none of the above
16. Force is expressed in units of ___.
a. kg
b. m/s
c. m/s2
d. kg x m/s2
17. Newton's second law can be expressed in equation form as _______.
a. v = d/t
b. a = Δv/t
c. F = ma
d. p = mv
18. How much force is needed to accelerate a 75-kg skater and his 2.5-kg skateboard at 0.5
m/s2?
a. 3.875N
b. 38.75 N
c. 37.5 N
d. 36.25 N
19. Near Earth's surface, gravity causes all falling objects to accelerate at ______.
a. 9.8 m/s
b. 9.8 m/s2
c. 98 m/s
d. 98 m/s2
20. An object that is thrown downward is affected by _______.
a. only gravity
b. only the downward force of the throwing hand
c. the mass of the object
d. gravity and the downward force of the throwing hand
21. What is the highest velocity that will be reached by a falling object called?
a. terminal velocity
b. maximum velocity
c. Mach one
d. maximum speed of acceleration
3
Name _________________________________
Period ________
22. A ball thrown horizontally from shoulder height will hit the ground _______ a ball dropped
from the same height.
a. before
b. at the same time as
c. after
d. harder than
23. ______ are human-made devices that orbit Earth for a specific purpose.
a. Natural satellites
b. Artificial satellites
c. Projectiles
d. Centripetal forces
24. The unit for ______ is kg × m/s.
a. force
b. momentum
c. velocity
d. acceleration
25. The law of conservation of momentum states that the total amount of momentum of a
group of objects does not change unless_______.
a. outside forces act on the objects
b. the objects are not moving
c. the objects have different masses
d. the objects exert forces on their surroundings
KEY
Chapter 4 Quiz
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7.
B
C
B
A
D
C
A
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D
B
A
C
C
C
B
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4
A
D
C
B
B
D
A
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B
B
B
A