Posted by irna on Saturday, April 23, 2011 at 3:28am.
Solve for the t when
first stone height = second stone height
300 - 4.9 t^2 = 75 t- 4.9 t^2
The "4.9" is g/2, in m/s^2
75 t = 300
t = 4 seconds
height = 300 - 4.9*16 = 226 m
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