question_answer

A body of mass 100 kg moving in a straight line with a velocity of 30 m/s, moves in the opposite direction with a velocity of 20 m/s after hitting a wall. What is its magnitude of impulse?

Answer:

\[m=100\,kg,\] \[u=30\,\,m/s\] \[v=-20\,m/s\] Impulse \[=m(v-u)\] \[=100[-20-30]=100\times (-50)\] \[=-5000\,\,Ns\] Therefore magnitude of impulse = 5000 Ns