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Two stones, A and B, are thrown horizontally
from the top of a cliff. Stone A has an initial
speed of 15 meters per second and stone B has
an initial speed of 30. meters per second.
Compared to the time it takes stone A to reach
the ground, the time it takes stone B to reach the
ground is
(1) the same
(2) twice as great
(3) half as great
(4) four times as great

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