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A particle of mass m describes a circle ...

A particle of mass `m` describes a circle of radius `r` . The centripetal acceleration of the particle is `(4)/(r^(2))` . What will be the momentum of the particle ?

A

`(2m)/(r )`

B

`(2m)/(sqrt(r ))`

C

`(4m)/(r )`

D

`(4m)/(sqrt(r ))`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A particle of mass m is moving in a horizontal circle of radius r, under a centripetal force equal to (-K//r^(2)) , where k is a constant. The total energy of the particle is -

    A
    `-k/r`
    B
    `-k/(2r)`
    C
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    D
    `(2k)/r`

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