Harish rolled a small steel ball from one edge of the glass bowl as shown. Consider that there is no friction between the surface of the ball and the bowl, what will happen?

The ball will roll out of the glass bowl near edge ‘B’

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It will stop at centre point ‘C’ after a number of to-and-fro motions.

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It will keep moving between point A and B and will never stop

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It will not move at all since friction is required for movement.

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Solution

The correct option is B
It will stop at centre point ‘C’ after a number of to-and-fro motions.

The forces which the ball experiences in this case are gravitational force and air drag. Due to these forces, the ball will keep oscillating between points A and B and will finally stop at the centre of the bowl at C (the equilibrium position) when it attains equilibrium.

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