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Assertion : In uniform circular motion s...

Assertion : In uniform circular motion speed of particle must be constant.
Reason : In uniform circular motion no force or acceleration is acting on particle acting parallel or in anti parallel to the direction of velocity.

A

Both Assertion & Reason are true & the Reason is a correct explanation of the Assertion.

B

Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

Assertion is true but the Reason is false.

D

Assertion & Reason are false.

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • In uniform circular motion of a particle

    A
    velocity is constant but acceleration is variable
    B
    velocity is variable but acceleration is constant
    C
    both velocity and acceleration is variable
    D
    speed is constant but acceleration is variable

  • During uniform circular motion of a particle

    A
    distance-time graph is a straight line
    B
    distance-time graph is a parabola
    C
    displacement-time graph is a straight line
    D
    displacement-time graph is a parabola

  • In a uniform circular motion, the centripetal acceleration is

    A
    Towards the centre of the circular path and perpendicular to the instantaneous velocity
    B
    Away from the centre of the circular path and perpendicular to the instantaneous velocity
    C
    A variable acceleration making `45^@` with the instantaneous velocity
    D
    A variable acceleration , parallel to the instantaneous velocity

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    In a non uniform circular motion, the acceleration on the particle is

    For a particle performing a uniform circular motion the acceleration is

    Assertion : For uniform circular motion it is necessary the speed of the particle is constant. Reason : There is no tangential force or tangential acceleration acting on particle in uniform circular motion.

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