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A body of mass m1 is moving with a velocity v. It collides with another stationary body of mass m1. They get embedded. At the point of collision, the velocity of the system 

(A) Increases 

(B) Decreases but does not become zero 

(C) Remains same 

(D) Become zero

1 Answer

+1 vote
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Best answer

Correct option: (B) Decreases but does not become zero

Explanation:

1st body : mass – m1 velocity – v

2nd body : mass – m1 velocity – o

They get embedded then velocity be V

by
law of conservation of momentum,

m1v + m1o = (m1 + m1)V

m1v = 2m1V

V = (v/2)

i.e. Velocity decreases but doesn’t become zero. 

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