Posted by **lily** on Thursday, April 7, 2011 at 7:25pm.

Tyler is on the 15th floor of a building. She throws a ball straight down from the window, which is 220 feet above the ground. How fast must she throw the ball(in feet per second) for it to hit the ground in 3 seconds?

- math urgent! -
**Henry**, Thursday, April 7, 2011 at 9:04pm
d = Vo*t + 0.5gt^2 = 220Ft.

3Vo + 0.5 * 32 * 3^2 = 220,

3Vo + 144 = 220,

3Vo = 220 - 144 = 76,

Vo = 25.33 Ft/s.

- math urgent! -
**Henry**, Thursday, April 7, 2011 at 9:13pm
Lily,check your 4-5-11,6:42pm post for

solution to your proportions prob.

## Answer This Question

## Related Questions

- math - Katie is on the 15th floor of a building. She throws a ball straight down...
- MATH URGENT! - Madison is standing on the roof of a building that is 350 feet ...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- Math - You throw a ball into the air with an initial vertical velocity of 31 ...
- calculus - A ball is dropped from the top of a building. The height, , of the ...
- Calculus - A ball is dropped from the top of a building. The height, , of the ...
- Math- - A ball is thrown vertically upward with an initial velocity of 96 feet ...
- calculus - A light is attached to the wall of a building 64 feet above the ...

More Related Questions