A bullet of mass 10 g is fired towards east from a gun of mass 2 kg. The velocity of the bullet is 75 m/s, then the recoil velocity of the gun is
(a) 2.5 m/s towards east
(c) 0.4 m/s towards east
(d) 0.4 m/s towards west
(b) 2.5 m/s towards west (d) 0.4 m/s towards west
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500 m/s correct answer
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