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If a force vecF=(-3hati+4hatj+2hatk) act...

If a force `vecF=(-3hati+4hatj+2hatk)` acts on a body and displaces it such that `vecs=(4hati-3hatj-2hatk)` then calculate the amount of work done by the force.

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Work done`W=vecF.vecs=(-3hati+4hatj+2hatk).(4hati-3hatj-2hatk)`
`=(-3xx4)hati.hati+(4xx-3)hatj.hatj+(2xx-2)hatk.hatk=-12xx1-4xx1`
W=-28 units
Note: `hati.hatj=hatj.hatk=hatk.hati=0`
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SUBHASH PUBLICATION-MOTION IN PLANE-NUMERICALS WITH SOLUTIONS
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