Question

The work done by the force 4i-3j+2k in moving a particle along a straight line from the point (3, 2, -1) to (2, -1, 4) is

Answer 1

force = (4,-3,2)

displacement = (-1,-3,5)

work done =f x d= (4,-3,2) x(-1,-3,5)=-4+(-9)+10 =5J