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December 18, 2014

December 18, 2014

Posted by **Ashley** on Thursday, January 27, 2011 at 7:04pm.

- Physical science -
**bobpursley**, Thursday, January 27, 2011 at 7:08pmconsider energy.

InitialKineticEnergy=finalPotentialEnergy

1/2 mv^2=mg*13

V =sqrt(2*9.8*13) that is the initial velocity.

the average velocity going up is half that, so time up= 12/(1/2 sqrt(2*9.8*13)

grab your calculator.

Time down is the same as time up.

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