A bullet of mass 20 g fired from a gun of mass 5 kg with velocity 200 m/s. Recoil velocity of gun is MCQ with Answer and Explanation

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A bullet of mass 20 g fired from a gun of mass 5 kg with velocity 200 m/s. Recoil velocity of gun is

A. 1 m/s

B. 2 m/s

C. 0.8 m/s

D. 0.4 m/s

Answer: Option C

Solution (By JKSSB Mock Tests)

Conservation of momentum: 0 = (0.02×200) + (5×v) => v = -4/5 = -0.8 m/s (magnitude 0.8 m/s).

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