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April 19, 2014

April 19, 2014

Posted by **ricajane** on Tuesday, February 28, 2012 at 8:36am.

a.) work done in going down

b.) power developed by ursula in going down

- physics -
**drwls**, Tuesday, February 28, 2012 at 8:53ama) W = -M g H

b) P = -M g H/t

The minus sign means gravity does work on Ursula, going down the stairs.

M = 75 kg

g = 9.8 m/s^2

H = 10 m

t = 8 s

P is in Watts

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