Impulse of Force From the previous section, you have seen that Newtons Second Law can be summed up by the formula F = ma.When a net force acts on a body, it accelerates in the direction of the force. By definition, acceleration, a is the rate of change in velocity and is given by the formula:Since (mv - mu) is the change of momentum, therefore,or force is equal to … [Read more...] about How Impulse is Related to The Change in Momentum