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A particle moves in a circle of radius...

A particle moves in a circle of radius `R`. In half the period of revolution its displacement is …………… and distance covered is …………... .

A

Zero

B

`pi r`

C

`2 r`

D

`2pi r`

Text Solution

Verified by Experts

The correct Answer is:
( c)
As is clear from Fig., displacement after half a circle, starting from `A = vec(AB) = 2 r` (in magnitude).
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Knowledge Check

  • A particle is moving in a uniform circular motion with radius'r' in half revolution the displacement and distance covered by the particle are

    A
    `2r, 2pi r`
    B
    `1.414 r, 3.142 r`
    C
    `2r,pi r`
    D
    `pi r, 2r`

  • If a particle covers half the circle of radius R with constant speed then

    A
    Momentum change is mvr
    B
    Change in K.E is `1//2 mv`
    C
    Change in K.E is mv
    D
    Change in K.E is zero

  • A particle of mass m is moving along a circle of radius r with a time period T . Its angular momentum is

    A
    `(2pimr)/T`
    B
    `(4pimr)/T`
    C
    `(2pimr^(2))/T`
    D
    `(4pimr^(2))/T`