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A cannonball is fired at a cliff of height h with an initial speed of v0...

A cannonball is fired at a cliff of height h with an initial speed of v0 = 42.0 m/s directed at an angle of θ = 60.0° above the horizontal. The cannonball strikes point A precisely 5.50 s after it is launched. Ignore air resistance. a) Find the maximum height the cannonball reaches, H. b) Find the height of the cliff, h. c) Find the velocity of the cannonball the instant before it strikes point A. Give your answer in unit vector notation.

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