AP Physics 1easymcq1 pt
A 3.0 kg cart moving at 4.0 m/s collides with and sticks to a 1.0 kg cart at rest. Their common speed afterward is
A.3.0 m/s
B.4.0 m/s
C.12 m/s
D.1.0 m/s
Explanation
Core Concept
Momentum conservation: (3.0)(4.0) = (4.0)v, so v = 3.0 m/s.
Correct Answer
A3.0 m/s
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