Differentiate between impulsive and Non impulsive …

The process of minimizing an impact force can be approached from the definition of the impulse of force: If an impact stops a moving object, then the change in momentum is a fixed quantity, and extending the time of the collision will decrease the impact force by the same factor. Non-impulsive Force:  A constant force acting on a body is an example of non-impulsive force Why does cricketer move his hand backwards while catching a fast moving cricket ball ?? Because, While catching a fast moving cricket ball,afielder in the ground gradually pulls his hand backward with the moving ball,In doing so, the fielder increases the time during which the high velocity of the moving ball decrease to zero. Thus, the acceleration of the ball is decreased and therefore the impact of catching the fast moving ball is also reduced. If the ball stopped suddenly then its high velocity is decreased to zero in a very short interval of time. Thus, the rate of change of momentum ofthe ball will be large. Therefore, a large force would have to be applied for holding the catch that may hurt the palm of the fielder.