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A particle moves in space such that its ...

A particle moves in space such that its position vector varies as `vec(r)=2thati+3t^(2)hatj`. If mass of particle is 2 kg then angular momentum of particle about origin at `t=2` sec is

A

`12hatk`

B

`48hatk`

C

`36hatk`

D

`24hatk`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A particle moves on the xy-pane such that its position vector is given by vec(r)=3t^(2) hati-t^(3) hatj . The equation of trajectory of the particle is given by

    A
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    B
    `((3x)/2)^(4//3)+4y=0`
    C
    `(x/32)^(3//2) +y=0`
    D
    none of these

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    A
    `-80hatk`
    B
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    C
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  • A particle moves so that its position vector varies with time as vec(r )= A cos omegathat(i)+A sin omega t hai(j) . The initial velocity of the particel the particle is

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    B
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