A large force acting for a short time to produce a finite change in momentum is called an impulsive force.

Example: (I) Force exerted by a bat, while heating a ball.

(II) Blow of hammer on a nail.

Expression For an Impulse

Let we consider a constant force F which acts on a body for time ∆t. then the impulse is given by

I = F∆t

According to Newton’s second law

F = dp/dt or F.dt = dp

It in time 0 to t, the momentum of the body changes from P₁ to P₂, then


Thus, the impulse of a force is equal to the total change in momentum produced by a force.

Must Read

NCERT Class 11 Physics Book PDF Free Download

Also Read

SL Arora Class 11 Physics Book PDF Free Download

All In One Arihant Class 11 Physics Book PDF Free Download

Arihant All In One Chemistry Class 11 Book PDF Free Download

NCERT Class 11 Physics Hand Written Notes Chapter-Wise

Chapter-1 (Physical World) PDF Free Download

Chapter-2 (Units and Measurement) PDF Free Download

Chapter-3 (Motion In A Straight Line) PDF Free Download

Chapter-4 (Motion In A Plane) PDF Free Download

Chapter-5 (Laws Of Motion) PDF Free Download

Scroll to Top