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Question

A bullet of mass 0.1kg is fired with the speed of 100ms, the mass of the gun being 50kg. The velocity of recoil is:


A

0.05ms

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B

0.5ms

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C

0.2ms

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D

0.1ms

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Solution

The correct option is C

0.2ms


Step-1: Given data

Mass of the bullet, m=0.1kg

Speed of the bullet, u=100m/s.

mass of gun, M=50kg.

Step-2: Finding the velocity of recoil

As there are no external force, on conserving momentum we get:

m×u=M×v0.1×100=50×vv=0.2ms.

Hence recoil velocity is 0.2ms and correct option is (c).


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