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September 16, 2014

September 16, 2014

Posted by **Anonymous** on Thursday, October 14, 2010 at 2:39am.

- physic -
**bobpursley**, Thursday, October 14, 2010 at 9:20amThe average height before is 4.25cm

The average height after is 4*8.25cm

work=7(1.3)*(4*.0825 - .0425)*9.8 joules

work = massmoved*change height*g

Make certain you know why seven masses are in the calculation.

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