Q.No.3.8: - Find the change in momentum for an object subjected, to a given force for a given time and state lawof motion in terms of momentum.

Q.No.3.8: - Find the change in momentum for an object subjected, to a given force for a given time and state lawof motion in terms of momentum.

Ans: - Consider a body of mass “m” moving with an initial velocity v_i. Let us suppose that an external force F acts upon it for time “t” after which velocity becomes v_f. If this force produces an acceleration a, then it is expressed as,



This is Newton’s 2^nd law in terms of momentum.