Apentix/AP Physics 1/Unit 5: Momentum/Question
AP Physics 1mediummcq1 pt

A 0.1 kg ball moving at 5 m/s collides with a 0.2 kg ball at rest. If the 0.1 kg ball stops after the collision, what is the velocity of the 0.2 kg ball?

A.10 m/s
B.2.5 m/s
C.5 m/s
D.1 m/s

Explanation

Core Concept

Conservation of momentum: (0.1)(5) + (0.2)(0) = (0.1)(0) + (0.2)(v). So 0.5 = 0.2v, v = 2.5 m/s.

Correct Answer

B2.5 m/s

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