A 20 kg body is pushed with a force of 7N for 1.5 sec then with a force of 5N for 1.7 sec and finally with a force of 10N for 3 sec, the total impulse applied to the body and change in velocity will be

A 20 kg body is pushed with a force of 7N for 1.5 sec then with a forc

1.	A 20 kg body is pushed with a force of 7N for 1.5 sec then with a force of 5N for 1.7 sec and finally with a force of 10N for 3 sec, the total impulse applied to the body and change in velocity will be
Answer» `49Ns,12.5ms^(-1)` `49Ns,2.45ms^(-1)` `98Ns,4.9ms^(-1)` `4.9Ns,2.45ms^(-1)` SOLUTION :`J=Fxxt, J=F_(1)t_(1)+F_(2)t_(2)+F_(3)t_(3), J=m(v-u)`