Remember potentials add.
bring m1 into .04 m from m2 and m4 and .04*sqrt 2 from m3
get Pe remember G MM'/d
then do m 2 in between the other 3
then m3 , then m4
then add
Four masses m1 = 1kg, m2 = 2kg, m3 = 3kg and m4 = 4kg are at the corners of a
square of sides 4cm. What is the gravitational potential energy of the system?
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