What do document examiners use chromatography for?

What is the equation for electrical work?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.