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A 2 kg body at 6 m/s sticks to a 4 kg body at rest. Final speed?
A3 m/s
B1 m/s
C2 m/s
D6 m/s
Answer & Solution
Correct answer: C. 2 m/s
Momentum conservation: 2 x 6 = 6 x v, so v = 2 m/s.
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