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Find the torque of a force vecF= -3hati+...

Find the torque of a force `vecF= -3hati+hatj+5hatk ` acting at the point `vecr=7hati+3hatj+hatk`

A

`14hati-38hatj+16hatk`

B

`4hati+4hatj+6hatk`

C

`21hati+4hatj+4hatk`

D

`-14hati+34hatj+16hatk`

Text Solution

Verified by Experts

`vectau=vecrxxvecF=|[hati,hatj,hatk],[7,3,1],[-3,1,5]|`
`=14hati-38hatj+16hatk`
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