Posted by **Noah** on Sunday, September 2, 2012 at 10:55pm.

A 0.67 kg rock is projected from the edge of

the top of a building with an initial velocity of

11.6 m/s at an angle 52

◦

above the horizontal.

Due to gravity, the rock strikes the ground at

a horizontal distance of 19.5 m from the base

of the building.

How tall is the building? Assume the

ground is level and that the side of the building is vertical. The acceleration of gravity is

9.8 m/s

2

.

Answer in units of m

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