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Assertion A body is momentarily at rest ...

Assertion A body is momentarily at rest at the instant if it rverse the direction.
Reason A body connot have acceleration,If its velocity is zero at a given instant of time

A

If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.

B

If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.

C

If Assertion is Trie but the Reason is False.

D

If both Assertion `&` Reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
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Assertion : A body is momentarily at rest at the instant it reverses the direction. Reason : A body cannot have acceleration if its velocity is zero at a given instant of time.

Can a body have acceleration without having velocity?

Knowledge Check

  • Assertion : A particle may be momentarily at rest and yet have non-zero acceleration. Reason : The zero velocity of a particle at any instant does not necessarily imply zero acceleration at that instant.

    A
    If both assertion and reason are trure and reason is the correct explanation of assertion.
    B
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    C
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    D
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  • Assertion: If a body is momentarily at rest, it means that force or acceleration are necessarily zero at that instant. Reason: Force on a body at a given time is determined by the direction of motin only.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true and reason is the not correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

  • Work done by a body moving on a circular track is zero at every instant because:

    A
    displacement is zero.
    B
    displacement is perpendicular to the centripetal force.
    C
    there is no force acting.
    D
    reason is not mentioned in the other options.

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