physics

I need so much help, thanks in advance!

Determine the gravitational energy of your 3kg physics binder
a) relative to the table it sits on
b) relative to the floor, 0.68 meters below the book
c) relative to the floor 2.5 meters above the book

1. a. zero
b. mgh=3kg*9.8N/kg*.68m
c. mgh=3kg*9.8N/kg*-2.5m

posted by bobpursley

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