If we want to describe work, we must have
Aan action which causes no movement or reaction.
Ba force and a movement in the opposite direction of the force.
Ca force and a movement in the same direction as the force.
Dan action which causes movement and an opposite reaction.
Aan action which causes no movement or reaction.
Ba force and a movement in the opposite direction of the force.
Ca force and a movement in the same direction as the force.
Dan action which causes movement and an opposite reaction.