Question

Help asap?

A man pulls a 50.0 kg box with a rope parallel to the ground. He pulls the box 100.0 m. About how much work has he done?

Answer 1

Not enough information to answer your question.
We need to know the coefficient of friction between the box and the ground.

Answer 2

Work equals the force along a distance. We know the force from gravity, but it doesn't act along the distance pulled. If there are no forces, no work.

Answer 3

There has to be an applied horizontal force, otherwise how would it have moved horizontally?