Question

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

Moderate

Solution

J = F x t ,J = F₁t₁ + F₂ t₂ + F₃ t₃ , J = m(v - u)

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