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August 2, 2015

Homework Help: AP Physics

Posted by Alex on Tuesday, August 24, 2010 at 5:59pm.

A rock thrown straight up with a velocity of
30 m/s from the edge of a building just misses
the building as it comes down. The rock is
moving at 47 m/s when it strikes the ground.
How tall was the building? The accelera-
tion of gravity is 9.8 m/s2 .
Answer in units of m.

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