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