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A boy throws a stone horizontally from the top of a cliff of height h toward the ocean below. The stone strikes the ocean at distance d from the base of the cliff. In terms of h, d, and g, find expressions for the following.

(a) the time t at which the stone lands in the ocean

t = ?

(b) the initial speed of the stone

vxi = ?

vf = ?

(d) the direction of the stone's velocity immediately before it reaches the ocean

?f = below the horizontal

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