Question

Impulse is a fundamental concept in physics that quantifies the effect of a force acting over a period of time. It is directly related to the change in an object's momentum.

Answer 1

Impulse is the measure of the effect of a force acting over a period of time, equal to the change in momentum of an object.

Answer 2

Impulse ($J$) is the time integral of force, equal to the change in momentum ($\Delta p$). $J = \int F dt = \Delta p$ For a constant force $F$ acting over a time interval $\Delta t$, impulse is $J = F \Delta t$.