Posted by **Ashley** on Sunday, January 30, 2011 at 2:20pm.

A ball is thrown horizontally from the top of a building 55.4 m high. The ball strikes the ground at a point 65 m from the base of the building.

The acceleration of gravity is 9.8 m/s2 .

Find the time the ball is in motion in seconds.

- Physics -
**bobpursley**, Sunday, January 30, 2011 at 2:38pm
hf=hi+vi*t-4.9t^2

solve for time.

- Physics -
**Ashley**, Sunday, January 30, 2011 at 3:01pm
how do i solve for time when i don't know initial velocity?

- Physics -
**Anonymous**, Tuesday, December 16, 2014 at 8:03pm
dy(height)=1/2 times acceleration due to gravity(9.81) times time squared

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