Assertion : Use of ball bearings between two moving parts of a machine is a common practice. Reason

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4-2.Friction

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$Assertion$ : Use of ball bearings between two moving parts of a machine is a common practice.
$Reason$ : Ball bearings reduce vibrations and provide good stability.

AIf both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

CIf the Assertion is correct but Reason is incorrect.

DIf both the Assertion and Reason are incorrect.

(AIIMS-2006)

Solution

Ball bearing are used to convert sliding friction to rolling friction. Sliding friction is less than rolling friction

Standard 11

Physics

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