Question

an object mass 5 kg is moving with a velocity of 4m/s. a constant force of 20N acts on the object .what will be the velocity after 3s?

Answer 1

since we have the formula force is equal to the rate of change of momentum hence the velocity after time t = 3s , then we have f=p/t = mv/t then substituting values we get ans as 12m/s