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# What is an impulse?

It is the change of rate of momentum Impulse is the integral of force over time, it is measured inNewton-seconds. For instance a force of one Newton applied over onesecond w…ill change the momentum, a force of two Newton's appliedover half of a second will have a similar effect. For rigid body collisions we take this to its limit and apply aninfinite force over an infinitesimally small time. This impulse isequal to the change in momentum of the colliding objects. Becausewe are talking about forces here, Newton's third law applies, andthe impulse on the colliding objects will be equal and opposite. impulse = m(vf- vi) In simple words: Impulse- A form of fast-moving electrical messages (MORE)