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Find the torque about the origin when a ...

Find the torque about the origin when a force of `3 hatj` N acts on a particle whose position vector is `2 hatk` m

A

`5 hatj Nm`

B

`-6 hati Nm`

C

`6 hatk Nm`

D

`6 hati Nm`

Text Solution

Verified by Experts

`bar F = 3 hatj N, bar r = 2hatk`
`bar tau = bar r xx bar F = 2 hatk `
`=6 ( - hati)`
`bar tau = - 6 hati Nm`
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Knowledge Check

  • What is the torque of a force 3hati+7hatj+4hatk about the origin if the force acts on a particle whose position vector is 2hati+2hatj+1hatk ?

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    A
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