impulsive force

Impulse is the new concept of dynamics. In order to understand this one, we have to approach the example i.e., the force experienced by the ball when hit by the bat during very little time.
Mainly, the linear momentum of ball changes substantially during this little time.

A large force acting very short interval of time is called impulsive force.
Above figure shows the impulsive force with constant direction varying during short interval of time(between t1 and t2) because of collision.
Suppose a body mass of 'm' moves with velocity 'u' ,during collision, it is acted by impulsive force 'F', with in very short interval of time 'delta t' and changes its velocity to 'v', then
This equation shows the impulsive force during small time t(the product of applied force and time) which equals to the change in momentum of the body.
Above equations can be expressed mathematically as
Mainly, impulse is deformation effect to objects. Shock observers are used to increase the time of action of impulsive force.