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Q.

[87]:
Is it true that, if a body is at rest, its velocity would be zero, and hence its momentum will also be zero?

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a

True

b

False

answer is A.

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Detailed Solution

The above statement is true.
If the body is at rest, its velocity will be zero; hence, its momentum will also be zero.
As we know, the velocity of a body depends on the displacement; if a body is at rest, there will be no displacement, so its velocity gets zero. And the momentum of a body depends on its mass and velocity.

momentum = velocity \times mass

If the body is at rest, its velocity will be zero; hence, its momentum will also be zero. So if it has zero velocity, the momentum will also become zero. Velocity can be stated as the “rate of change of position of an object to time”. The SI unit of velocity is

m / s

. It is a vector quantity, meaning it has magnitude and direction.

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