4. The impulse of a body is equal to :
(a) rate of change of its momentum
(b) change in its momentum
(c) the product of force applied on it and the time of application of force.
(d) both (b) & (c).
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The impulse of a force (also measured in N s) is equal to the change in momentum of a body which a force causes. This is also equal to the magnitude of the force multiplied by the length of time the force is applied.
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