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September 2, 2014

Homework Help: Physics

Posted by Hadeel on Thursday, April 7, 2011 at 1:14am.

A 65kg boy and his 40kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backwards with a velocity of 2.9m/s towards the west. Ignore friction. What is the minimum amount of chemical energy is converted into mechanical energy in the girl’s muscles?

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