Question
As oscillating pendulum stops after some time. Is this a violation of the law of conservation of mechanical energy?
✓
Answer
There is mutual conversion between the kinetic energy and potential energy of an oscillating pendulum. But the total energy of the object remains constant and the law of conservation of mechanical energy is followed. But this situation is possible only when friction force is not present but in reality there is some friction force in the oscillating pendulum due to which the pendulum stops after some time.
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