Neglecting air resistance, the motion of an object moving vertically near 2 Earth’s surface is determined by the acceleration due to gravity, which is 9.8 ?/? . Suppose a stone is vertically upward at ? = 0 with a velocity of 40 ?/? from the edge of a cliff that is 100m above a river. a) Find the velocity ?(?) of the object, for ? ≥ 0. b) Find the position ?(?) of the object, for ? ≥ 0. c) At what time the stone reaches the maximum height, and what is the maximum height?

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A: ANSWER IS AS BELOW:

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