Vector HELP !!!

Question

A vertical force of 5 (pounds) moves an object from point (4,3,7) to (10,-1,9), where distance is measured in feet. 

The force vector is F = 

The displacement vector is d =

The work done by the force on the object is F.d =

I found the displacement vector which is: 6i-4j+2k

Answer 1

Your answer for the displacement vector is correct. Assuming the vertical direction is along the z-axis,

F = 5k lbs

W = F.d

W = 5(2) ft-lbs = 10 ft-lbs