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4. An archer aims directly at an apple attached to a tree branch a horizontal distance d away and a
vertical height h up. At the exact moment the arrow is shot, the apple starts to fall from the tree.
Show that (i.e. write down and solve equations for this situation that prove that) no matter the
initial velocity of the arrow, the distance, or the height, it always hits the apple.
d

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$let the initial veocity is v .$

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