Posted by tom on Monday, July 19, 2010 at 2:03am.
use
E = mgh + 1/2 mv^2
= (800 L)(1 kg / 1 L) (9.8 m/s^2) (15m) + 1/2 (800 L)(1 kg / 1 L) (17 m/s)^2
= 233200 J
I agree with that.
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