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In the figure here, a ball is thrown up onto a roof, landing 3.20 s later...

In the figure here, a ball is thrown up onto a roof, landing 3.20 s later at height h = 21.0 m above the release level. The ball's path just before landing is angled at ? = 67.0? with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the motion, as if it is on a video.) What are the (b) magnitude and (c) angle (relative to the horizontal) of the ball's initial velocity?

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