question_answer

Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s?

Answer:

\[m=5\,kg\,\,u=20m/s\,\,v=0.20m/s\] Change in momentum = Final momentum - initial momentum = (mass × final velocity) - (mass × initial velocity) \[=(5\times 0.20)-=(5\times 20)\] \[=5\,\,(0.20-20)\] \[=5\times 19.80=99\,\,kg\,\,m/s\]