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In each of the problems given below, fin...

In each of the problems given below, find the work done by a force `vecF` acting on a particle, such that the particle is displaced from a point A to a point B. `vecF` = `2hati+hatj-hatK`
A(0,1,2), B(-2,3,0)

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Displacement `vecS = (-20)hati+(3-1)hatj+(0-2)hatk`
= `-2hati+2hatj-2hatk`
Work done = `vecF.vecS`
= `(2hati+hatj-hatk).(-2hati+2hatj-2hatk)`
= -4+2+2 = 0 units.
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