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Second Law of Motion

Assertion :If...

Question

Assertion :If the net force on a rigid body is zero, it is either at rest or moving with a constant linear velocity. Nothing else can happen. Reason: Constant velocity means linear acceleration is zero.

A

If both Assertion and Reason are true and Reason is the correct explanation for Assertion.

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B

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

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C

Assertion is false but Reason is correct.

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D

Both Assertion and Reason are false.

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Solution

The correct option is B If both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
According to Newton's first law. If the resultant force on the rigid body is equal to zero then it will either in rest or will move with uniform velocity.
Both assertion and reason are true but the reason is not the correct explanation. (Ans B)

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