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A particle of mass 2kg is moving such th...

A particle of mass 2kg is moving such that at time t its position in meter is given by `barr(t)=5hati-2t^(2)hatj`. The angular momentum of the particle at `t=2s` about the origin in `kgm^(-2)s^(-1)` is

A

`-80hatk`

B

`(10hati-16hatj)`

C

`-40hatk`

D

`40hatk`

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The correct Answer is:
A
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