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Suppose that you loft the ball with an initial speed of v = 15.2 m/s, at...

Suppose that you loft the ball with an initial speed of v = 15.2 m/s, at an angle of θ = 49.2° above the horizontal. At this instant your opponent is d = 10.0 m away from the ball. He begins moving away from you 0.250 s later, hoping to reach the ball and hit it back at the moment that it is h = 2.09 m above its launch point. With what minimum average speed must he move?

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