MHT CET 2024 Physics question

For a particle moving in vertical circle, the total energy at different positions along the path [The motion is under gravity]

(A)may increase or decrease
(B)decreases
(C)is conservedCorrect
(D)increases

Answer: (C)

Solution

In a vertical circle the forces on the particle are gravity (a conservative force) and the tension/normal reaction, which always acts along the radius, perpendicular to the velocity, and therefore does zero work. Hence no non-conservative force does work and the total mechanical energy stays

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Question ID VK-096755