Question

A body constrained to.Move in z direction is subjected to a force given by f=(3i -10j+5k) n. What is the work done by this force in moving the body through a distance of 5m along z axis

Answer 1

Answer:

25J

Explanation:

work done=f.s (scalar product)

i.j=j.k..... =0

k.k=1

5k.5k=25