AP Physics 1mediummcq1 pt
A 1200 kg car moving at 15 m/s collides with a 800 kg car at rest and they lock bumpers. Their common speed is
A.9.0 m/s
B.15 m/s
C.7.5 m/s
D.22.5 m/s
Explanation
Core Concept
(1200)(15) = (2000)v, so v = 18000/2000 = 9.0 m/s.
Correct Answer
A9.0 m/s
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