A) When a body slides on rough surface, its momentum is not conserved.
B) When a ball falls from a height, momentum of earth ball system is conserved
C) In case of explosion of flying bomb, momentum is conserved.

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A, B are true

A, B, C are true

A, C are false

A is false

answer is B.

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Detailed Solution

The gravity force is the external force at work when a flying bomb detonates.
Option (C) is correct because the force of gravity is not impulsive and is significantly smaller than the force of an explosion.
Both the falling ball and the ground are being pulled by the same force.
Therefore, the earth-ball system experiences no net external force.
As a result, statement B is correct. Momentum is not conserved when a body slides on a rough surface because of the force of friction exerted on the body.

Hence the correct answer is A,B,C are true.

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