Posted by **jo** on Sunday, July 1, 2012 at 2:46am.

two tall buildings are 200m apart .with what speed must a ball be thrown horizontally from the window 540 m above the ground in one building, so that it will enter a window 50m above the ground in the other?

- science -
**Damon**, Sunday, July 1, 2012 at 4:29am
vertical problem

how long to fall 490 meters?

490 = (1/2)(9.81) t^2 solve for t

horizontal problem, same t

u t = 200

u = 200/t

- science -
**Jashan 11sci **, Monday, September 12, 2016 at 2:38am
Using Range = u^2*2h/g (using g = 9.8m/s^2)

u^2 = r*g/2h

u^2 = 400

u=20m/s

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