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A uniform cord of length 25 cm and mass 15 g is initially stuck to a ceiling. Later, it hangs vertically from the ceiling with only one end still stuck. What is the change in the gravitational Potential Energy of the cord with this change in orientation ?
Dear Sanchit
Given cord is uniform so here in this case we should only see how much center of mass of cord fall .
length of the cord is 25 cm,its center of mass is the middle point of the cord
so change in gravitational potential energy= 15*g*(25/2)
=1875 X 10-5 N
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