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A boy wants to throw a ball into his friend’s window 16.0 m above. Assuming it just reaches the window, he throws the ball at 55.0° to the ground. At what velocity should he throw the ball?

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Range = Vo^2*sin(2A)/g = 16 m.
Vo^2*sin(110)/9.8 = 16
0.09589Vo^2 = 16
Vo^2 = 166.863
Vo = 12.92 m/s.

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