Posted by **Noah** on Tuesday, September 11, 2012 at 2:39am.

A ball is thrown horizontally from the top of

a building 51 m high. The ball strikes the

ground at a point 120 m from the base of the

building.

The acceleration of gravity is 9.8 m/s

2

Find the x component of its velocity just before it strikes the ground.

Answer in units of m/s

Find the y component of its velocity just before it strikes the ground.

Answer in units of m/s

- AP Physics -
**charlie**, Tuesday, September 11, 2012 at 7:59am
The ball goes 120m in time t. t, or fall time, is sqrt of 2h/g, both given.

120/t gives the x component of velocity in m/s.

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