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If Fhatk force is acting on particle has...

If `Fhatk` force is acting on particle has position vector `(2hati-2hatj)`, then torque on it is …... .

Text Solution

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The correct Answer is:
`F(hati-hatj)`
`hattau=vecrxxvecF=(2hati-hatj)xxFhatk`
`:. hattau=2F(hatixxhatk)+F(hatjxxhatk)`
`=2F(-hatj)+F(hatj)=F(hati-2hatj)`
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