a body constrained to move along the z axis of a coordinate system is subjected to a constant force F - Physics - Laws Of Motion

Question

a body constrained to move along the z axis of a coordinate
system is subjected to a constant force F = ( -i +2j +3k) N what is
the work done by the force in moving the body over a distance of 4
m along the z axis

Jyoti Pant · Accepted Answer

We know that the work done is given as
W = F s
here
F = -i + 2j + 3k
s = 0i + 0j + 4k
so, we have
W = (-i + 2j + 3k) (0i + 0j + 4k)
thus, we get
W = 3k 4k = 12 J

a body constrained to move along the z axis of a coordinate system is subjected to a constant force F = ( -i +2j +3k) N . what is the work done by the force in moving the body over a distance of 4 m along the z axis.