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  4. A particle of mass m is moving with a uniform velocity v1 It is given an impulse such that its velocity becomes v2. The impulse is equal to

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Q. A particle of mass $m$ is moving with a uniform velocity $v_1$ It is given an impulse such that its velocity becomes $v_2.$ The impulse is equal to

AIPMTAIPMT 1990Laws of Motion

Solution:

Impulse is a vector quantity and is equal to change in momentum of the body thus, (same as $F \times t $ where $t$ is short)
Impulse $=mv_2-mv_1=m(v_2-v_1)$