The impulse of a particle is equal to the change in the momentum of the particle caused by that force. It is a vector quantity and has the dimensions of momentum—that is, ML/T. It has the units same as that of momentum. Force is defined
as:
Thus, the impulse of a particle can be written as:
If a graph is drawn between force and time then it would be as follows:
It can be noted that the Impulse is given by the area under the F~t curve