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March 2, 2015

March 2, 2015

Posted by **Claudia** on Thursday, September 16, 2010 at 12:44am.

- physics -
**drwls**, Thursday, September 16, 2010 at 6:56amLet T be the time required to fall the entire height H. You will have to solve for both.

H = (g/2) T^2 = 4.9 T^2

H - 35.5 = (g/2)*(T-1.25)^2

= 4.9*(T-1.25)^2 = 4.9T^2 -12.25T + 7.656

Subtract the second equation from the first and solve for T. Then use that T to solve for H.

35.5 = 12.25T -7.7

T = 3.53 s

H = 60.9 m

Do it yourself and check my numbers; there could be a mistake.

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