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  1. B

    Physics help on motion in 1-d

    A stone is thrown vertically upward with a speed of 10 m/s from the edge of the cliff 65 m high. It reaches the ground sometime later a) what is the acceleration and velocity at the highest point. (I got acceleration=9.8 m/s^2 and velocity=o) b)What is the displacement for the freefall...