Physics Principles and Problems 2009

Section 9.2 : Conservation of Momentum

Self-Check Quizzes

1
An isolated system has a net external force of _____.
A)0
B)1
C)2
D)3
2
A system which does not gain or lose mass is said to be a(n) _____ system.
A)angular
B)closed
C)isolated
D)parallel
3
All the forces within a closed system are _____.
A)angular
B)due to gravity
C)external
D)internal
4
If C is 1 kg and Dis 100 kg, and the initial velocities of both balls are 5 m/s, how would the magnitude of the forces exerted by each ball on the other during the collision compare?

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A)The magnitude of the force of D on C would be greater than of C on D.
B)The magnitude of the force of C on D would be greater than of D on C.
C)They do not exert forces on each other.
D)The magnitude of the forces would be equal.
5
The law of conservation of momentum states that _____.
A)momentum is neither created nor destroyed
B)the momentum of any closed system does not change.
C)the momentum of any system does not change.
D)the momentum of any closed system with no net external force does not change.
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