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From what height above the top of the window did the stone fall?
A falling stone takes 0.28 s to travel past a window 2.2 m tall
1 Answer
- 1 decade agoFavorite Answer
"2. s = v0*t + (1/2)at^2
s = 2.2 meters and t = 0.28 seconds
2.2 = v0*(0.28) + (1/2)(9.8)(0.28)^2
2.2 = v0*(0.28) + 0.38416
1.81584 = v0*(0.28)
v0 = 6.485
So this is the speed of the stone at the top of the window.
v0 = at and s = (1/2)at^2 with t = SQRT(2s/a)
v0 = aSQRT(2s/a) = SQRT(2sa)
v0^2 = 2sa
s = v0^2/(2a)
s = (6.485)^2/(2*9.8)
s = 2.146 meters"
Source(s): best answer from http://answers.yahoo.com/question/index?qid=200807...
