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 component of the force do you use to calculate work?

Answer 1

You would use the x-component. Work is force times displacement.
Since you don't "move" down, there is no displacement in the y-direction, and therefore there is no work.

Answer 2

Gracias

Answer 3

De nada