The lob in tennis is an effective tactic when your opponent

Last updated: 5/9/2023

The lob in tennis is an effective tactic when your opponent is near the net It consists of lofting the ball over his head forcing him to move quickly away from the net see the drawing Suppose that you lob the ball with an initial speed of 15 0 m s at an angle of 50 08 above the horizontal At this instant your opponent is 10 0 m away from the ball He begins moving away from you 0 30 s later hoping to reach he ball and hit it back at the moment that it is 2 10 m above its launch point With what minimum average speed must he move Ignore the fact that he can stretch so that his racket can reach the ball before he does