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in question 49 of hcv............why is the energy in the spring conserved..

in question 49 of hcv............why is the energy in the spring conserved..

Grade:12th Pass

1 Answers

Ashish Kumar
askIITians Faculty 32 Points
7 years ago
As the external forces on the spring and masses system is zero in the horizontal direction momentum and energy would be conserved for the complete system .Initially the spring is compressed and has potential energy but the masses are at rest so total energy would be 1/2 kx^2 of the spring only.When finallly the masses come to rest then also the kinetic energy of the masses is zero and only the potential energy of spring will be present . So you equate the initial and final total energy which is potential energy of spring only.





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