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` = `4hati+2hatj+3hatk`
A(1,2,0), B(2,-1,3).

Explanation

Displacement of the particle `vecS = vec(AB)`
= `(2-1)hati+(-1-2)hatj+(3-0)hatk`
=`hati-3hatj+3hatk`
Work done = `vecF.vecS`
`(4hati+2hatj+3hatk).(hati-3hatj+3hatk)`
4-6+9 = 7units.