A rock is thrown from the edge of a cliff to the ground 19.5 m below. The rock has an initial velocity of 18.5 m/s, directed 15.0° above the horizontal.
(a) How long does it take the rock to reach the ground?
(b) How far from the base of the cliff does the rock strike the ground?
(c) Find the velocity of the rock just before it strikes the ground.
magnitude______
direction below the horizontal______
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