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Assertion : A sphere is placed in pure r...

Assertion : A sphere is placed in pure rolling condition over a rough inclined surface.Then, force of friction will act in downward direction

Reason : Angular acceleration (actually retardation) due to friction is anti-clockwise.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

B

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

C

If Assertion is true but Reason is fasle

D

If Assertion is false but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
D
Linear acceleration due to `mg sin theta` is downward. Hence for pure rolling to continue, force of friction should act upwards so that angular acceleration is anti-clockwise.
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