Question

A man pushes on a box at an angle of 30.0° with a force of 20.0 N and the box moves across the floor. Which of the following forces do you use to calculate work?
Is the force either 20.0 N or 17.3 N?

Answer 1

From there to determine the force that is actual moving the force, the force in the x direction, you use a little right triangle trig so you get \[20\cos(30)=F _{x}\]