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JEE PHYSICS MCQ: SYSTEM OF PARTICLES

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Assertion: When a sphere is rolls freely on a horizontal table, it slows down and eventually stops.

Reason: When the sphere rolls on the table, both the sphere and the surface deform near the contact. As a result, the normal force does not pass through the centre and provide an angular deceleration.

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Correct option: A

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Option A is correct. The sphere slows down due to deformation at the contact point, causing the normal force to be off-center and creating a torque that opposes the motion.

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