Question
A particle originally at a rest at the highest point of a smooth circle in a vertical plane, is gently pushed and starts sliding along the circle. It will leave the circle at a vertical distance
below the highest point such that

The correct answer is: 
From law of conservation of energy, potential energy of fall gets converted to kinetic energy.




Also, the horizontal component of force is equal centrifugal force.

From Eq. (i)

From 




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