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Assuming the height of your working desk is h=1.0m above the floor, the mass of ypur...

Assuming the height of your working desk is h=1.0m above the floor, the mass of ypur book is 100 times of your pen. assume there is no air friction in the room. What is the ration Ubook/Upen of their Potential energies with respect to the ground? if both the bok and the pen drop from rest from your table to the floor, what will be the ratio Vbook/Vpen of their speeds right before they hit the ground?

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