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Two tall buildings are situated 200m apart, with what speed must a ball be thrown horizontally from the window 540m above the ground in one building, so

that it will enter a window 50m above the ground in the other?


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 
0 0 0
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