A 0.02 kg bullet leaves a 3 kg gun at 300 m/s. Gun recoil speed?
A100 m/s
B20 m/s
C2 m/s
D0.2 m/s
Answer & Solution
Correct answer: C. 2 m/s
Momentum is conserved: 3 x v = 0.02 x 300, giving v = 2 m/s.
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