a uniform cord of length 25 cm and mass15g is initially stuck to a ceiling. late

Question

a uniform cord of length 25 cm and mass15g 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 mass15g 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 mass15g 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

Explanation / Answer

Given cord is uniform so here in this case we should only see how much center of mass of cord falls.

initially height of center of mass from ceiling=0

so inital gravitational potential energy=0

length of the cord is 25 cm,its center of mass is the middle point of the cord

so change in gravitational potential energy= 0.015*g*(.25/2) =0.0184 J

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