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A force of vecF=(hati+2hatj+3hatk)N when...

A force of `vecF=(hati+2hatj+3hatk)N` when acting on a particle propels it from a point `(hati+hatj+hatk)` to a point `(hati-hatj+2hatk)`. Calculate the amount of work done by the force.

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`vecF=(hati+2hatj+3hatk)," "vecs=(hati-hati-hatj-hatj+2hatk-hatk)`
i.e. `vecs=(-2hatj+hatk)`
but `W=vecF.vecs=(hati+2hatj+3hatk).(-2hatj+hatk)=-4+3=-IJ`
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