# What is Impulse in Physics? | Definition, Examples, Formula, Units – Laws of Motion

Impulse Definition Physics:
The product of impulsive force and time for which it acts is called impulse.

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## What is Impulse in Physics? | Definition, Examples, Formula, Units – Laws of Motion

Impulse Formula Physics:
Impulse = Force x Time = Change in momentum.

Unit for Impulse:
Impulse SI unit is newton-second (N-S) or kg-m/s

Impulse Examples in Physics:
1. Airbags are used in automobiles because they are able to minimize the effect of the force on an object involved.
2. You’re playing pool, and you strike a pool ball with the cue. The cue may be in contact with the ball for only a millisecond, but there’s an observable result — the ball is now in motion. That is a result of impulse.

Impulse Dimensional Formula
dimensional formula is [MLT-1].

• Impulse is also equal to change in momentum of the object.
• It is a vector quantity and its direction is in the direction of force.

Note:
Total impulse for the force applied during period t1, to t2 = Area under the F-t curve from t1 to t1.

Laws of Motion:
There are various laws in Physics that define the motion of the object. When an object is in motion whether it is linear or circular there is some force which is always imposed on it.