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When a force vecF=(hati+2hatj+3hatk) is ...

When a force `vecF=(hati+2hatj+3hatk)` is applied to body, it undergoes a displacement along a vector `vecs=(2hati-hatj+6hatk)`. Calculate the work done by the body.

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`vecF=(hati+2hatj+3hatk)`
`vecs=(2hati-hatj+6hatk)`
Work done `W=vecF.vecs`
`=(hati+2hatj+3hatk).(2hati-hatj+6hatk)`
`=2-2+18=18` units.
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