A child standing on the edge of a sheer cliff wall throws a rock down towards the ground below. The rock is thrown 63° below the horizontal at a speed of 8 m/s & lands 10 m from the base of the cliff wall. Ignore air drag. A) Determine how long the rock was in the air. B) Determine how high the cliff wall is. C) Determine how fast the rock was going upon impact. 46.74 m/s  D) Determine the angle of impact.

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