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March 29, 2015

March 29, 2015

Posted by **maura** on Friday, September 14, 2012 at 7:59pm.

From what height H above the ground did

the object fall? The acceleration of gravity is 9.8 m/s^2.

Answer in units of m

i understand that t= .904s

distance is 34m

and a = 9.8m/s^2

But I'm not sure what else to do here?

- physics -
**Elena**, Saturday, September 15, 2012 at 5:15amH=gt²/2

H-34 = g (t-0.904)²/2

gt²/2 34 = 0,5g(t²-20.904t +0.904²)

8.86t=38

t=38.8.86 = 4.3 s.

H= gt²/2 = 9.84.3²/2 = 90 m

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