Question

what is impulse of a force or impulsive force? what is its SI unit?

Answer 1

impulse received during an impact is definded as the product of the average force and the time for which the force acts.
Its SI unit is N s or kg m s-1
its dimensional formula is (M L T-1)
in cgs system it is dyn or g cm s-1.

Answer 2

the impulse of a force acting on a body is equal to the product of the force and the for which it acts on a body.


impulse force.....

the force which acts on a body for a very short time but produces a large change in the momentum of the body is called an impulsive force.
it is denoted by I
I=f×t