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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 ?

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 ? 

Grade:12

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

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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