AP Physics 1mediummcq1 pt
A 3.0 kg cart at 2.0 m/s catches up to and sticks to a 2.0 kg cart at 1.0 m/s moving the same way. Their common speed is
A.1.6 m/s
B.1.5 m/s
C.2.0 m/s
D.3.0 m/s
Explanation
Core Concept
(3.0)(2.0) + (2.0)(1.0) = (5.0)v, so v = 8.0/5.0 = 1.6 m/s.
Correct Answer
A1.6 m/s
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