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The lob in tennis is an effective tactic when your opponent is near the net. It...

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Physics

The lob in tennis is an effective tactic when your opponent isnear the net. It consists of lofting the ball over his head,forcing him to move quickly away from the net . Suppose that youloft the ball with an initial speed of 15.0 m/s at an angle of50.0° the horizontal. At this instant your opponent is 10.0 m awayfrom the ball. He begins moving away from you 0.21 s later, hopingto reach the ball and hit it back at the moment that it is 2.10 mabove its launch point. With what minimum average speed must hemove? (Ignore the fact that he can stretch, so that his racket canreach the ball before he does.)

Answer & Explanation Solved by verified expert
4.0 Ratings (629 Votes)
Initial speed is 150 ms at 50o above horizontal The vertical component of the initial velocity Vo Vo15sin50o115 ms The horizontal component 15cos50o96 ms the ball    See Answer
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