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Given vecF=(4hati-10hatj)and vecr=(5hati...

Given `vecF=(4hati-10hatj)and vecr=(5hati-3hatj)`. then torque `vectau` is

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Here `vecr=5hati-3hatj+0hatkandvecF=4hati-10hatj+0hatk`
`therefore vectau=vecrxxvecF=|(hati,hatj,hatk),(5,-3,0),(4,-10,0)|=hati(0-0)-hatj(0-0)+hatk(-50+12)=-38hatk`
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