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Q. A piece of stone is released from rest from the rooftop of a building, and falls vertically under gravity. It takes 6.60 s to reach the ground. Neglect air resistance. (Acceleration: 9.81ms-2)

a) How tall is the building?

b) With what speed does the stone hit the ground?

c) If a bullet is fired vertically upwards with the speed calculated in (b), what is the maximum height that the bullet can reach?

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