A sphere is released on a smooth inclined plane from the to…

Physics System of Particles Rotational Motion Conservation of Angular Momentum (Combined Translation & Rotational Motion) MCQ (Single Correct)

A sphere is released on a smooth inclined plane from the top. When it moves down its angular momentum is:

conserved about every point

conserved about the point of contact only

conserved about the centre of the sphere only

conserved about any point on a fixed line parallel to the inclined plane and passing through
the centre of the ball.

Text Solution

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The correct answer is:

As the inclined plane is smooth, the sphere can never roll rather it will just slip down.

Hence, the angular momentum remains conserved about any point on a line parallel to the inclined plane and passing through the centre of the ball.

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