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April 17, 2014

April 17, 2014

Posted by **dave** on Saturday, February 18, 2012 at 5:05pm.

- physics -
**Damon**, Saturday, February 18, 2012 at 5:12pmassume potential energy = 0 when h = 0

U = m g h

U top = total energy = m (9.8 * 12)

=

U + Ke = U top

so

if U = Ke then

U = U top /2 = m (9.8 * 6)

so

at h = 6 meters

In other words, when it loses half its original potential energy, the Ke = U and that is halfway down.

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