Answer
Force, time, and momentum.
Step-by-step explanation
An impulse occurs when a force is acting upon an object for a given amount of time in order to cause a change in momentum. When a force acts on an object for a short amount of time, an impulse is the measure of how much the force changes the momentum of an object.
Impulse= force x time
In short, if any object is subjected to certain amount of force at some given amount of time. This is called impulse.