A volley intercepts the ball before it bounces. Extremely short contact time makes impulse-momentum analysis critical. 

Impulse Analysis 
The ball approaches in one direction and must leave in the opposite direction. The total velocity change is the sum of the incoming and outgoing speeds, so faster incoming balls demand greater impulse from the racket. 

Contact Time and Control 
Volleys prioritize control over power. The racket face should be perpendicular to the desired return direction for optimal momentum transfer.