**Q.No.3.9: - Define impulse and show that how it is related to linear momentum?**

**Ans: -**

**If a very large force exert for a very short interval of time then product of such force and time is called impulse.**

__Impulse: -__
Mathematically

__Relation between impulse and linear momentum: -__
According to Newton ’s second law of motion, the force is defined as the rate of change of momentum.

Thus if force

**F**acting on a body for time ∆t, changes its momentum from**mv**to_{f}**mv**. Then the force is written as;_{i}

Hence, impulse is equal to the change of linear momentum.

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