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Standard XII

Physics

Rotation + Translation

A solid spher...

Question

A solid sphere purely rolls down an inclined plane such that it gains angular speed with time. The direction of frictional force on the sphere is .

vertically downward

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Downwards along the incline

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Upwards along the incline

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Solution

The correct option is C Upwards along the incline
Friction will oppose the relative motion and hence acts upwards along the incline. Because of torque of friction, the sphere gains angular speed in anti-clockwise direction as it falls along the incline.

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A solid sphere purely rolls down an inclined plane such that it gains angular speed with time. The direction of frictional force on the sphere is .

The correct option is C Upwards along the inclineFriction will oppose the relative motion and hence acts upwards along the incline. Because of torque of friction, the sphere gains angular speed in anti-clockwise direction as it falls along the incline.

The correct option is C Upwards along the incline
Friction will oppose the relative motion and hence acts upwards along the incline. Because of torque of friction, the sphere gains angular speed in anti-clockwise direction as it falls along the incline.