The pitch ( turf ) is being compressed more .
That energy can only come from the kinetic energy of the ball ( given that quick bowlers do n't impart any significant degree of top or backspin to the ball ) .
The pitch ( turf ) is being compressed more and that energy can only come from the kinetic energy of the ball ( given that quick bowlers do n't impart any significant degree of top or backspin to the ball ) .