3. Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for
friction
b. an unbalanced force
A Only
d. both A and B
4. An object's velocity will not change unless it is acted on by a(n)
net force
b.strong force
c.unbalanced force
d. opposite but equal force
5. The direction of a moving object will not change if the net force acting on it is
b. less than zero
a.greater than zero
c.A Only
d. both A and B
6. An object is accelerating when it
a.speeds up
b. slows down
c. changes direction
d. all of the above
7. If the mass of the object doubles, its weight
a.doubles
b. decreases
c.is not affected
d. reduced to half
8. Doubling the net force acting on an object,
a.doubles its acceleration
C. cuts its acceleration in half
b.decreases its acceleration
d. does not affect its acceleration
9. When an action force occurs, the reaction force is always
a.in the same direction as the action force
c. Bonly
b. equal and opposite to the action force
d. both A and B
10. When you jump, your action force acts on the ground and the reaction force
a.is exerted by the ground b. b.acts on you
c.A only
d. both A and B
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Answer:
3.C
4.A
5.D
6.C
8.D
9.B
10.B