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Mastery Quiz
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1

If the speed of an object is doubled, its momentum is multiplied by
A)4
B)2
C)0.5
D)0.25
2

Impulse is calculated as
A)the product of force and velocity
B)the product of mass times velocity
C)the force divided by the time interval
D)the product of the force and the time interval
3

The impulse/momentum theorem states that the impulse is equal to
A)the total momentum
B)the force divided by the momentum
C)the change in momentum
D)the square of the momentum
4

The purpose of an airbag in an automobile is
A)to prolong the time of impact for a given change in momentum thereby reducing the force of impact
B)to deliver a greater force to the car occupant upon impact
C)to shorten the time of impact
D)to reduce the momentum of the vehicle
5

If the speed of an object is doubled its kinetic energy is multiplied by
A)4
B)2
C)0.5
D)0.25
6

The principle of conservation of momentum
A)states that it is impossible to change the momentum of an object
B)is valid for all collisions
C)is valid only for perfectly elastic collisions
D)is valid only for perfectly inelastic collisions
E)is valid only if the net external force acting on the system is zero
7

A perfectly inelastic collision is one in which
A)there is no damage to either object
B)the objects bounce off each other
C)the objects stick together after the collision
D)kinetic energy is conserved
8

A perfectly elastic collision is one in which
A)the objects stick together after the collision
B)there are no forces on either object during the collision
C)the objects must have exactly the same masses
D)kinetic energy is conserved
E)momentum is not conserved
9

The impulse/momentum theorem is a restatement of Newton's Second Law. 
A)True
B) False
10

Increasing the mass of an object without changing its velocity
A)increases its momentum and its kinetic energy
B)decreases its momentum
C)does not change its momentum
D)increases its momentum and decreases its kinetic energy
E)does not change its kinetic energy





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