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A body moves from a position vec(r(1))=(...

A body moves from a position `vec(r_(1))=(2hati-3hatj-4hatk)` m to a position `vec(r_(2))=(3hati-4hatj+5hatk)m` under the influence of a constant force `vecF=(4hati+hatj+6hatk)N`. The work done by the force is :

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