alleryA bullet of mass 10 g is fired from a gun of mass 5 kg with a muzzle velocity of 400 m/s. The recoil speed of the gun is:
A0.8 m/s
B8 m/s
C80 m/s
D40 m/s
Answer & Solution
Correct answer: A. 0.8 m/s
By momentum conservation: M V = m v ⇒ V = (0.01·400)/5 = 0.8 m/s.
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