The work done can be defined as a force which can cause the motion of the object in the direction where the force is applied.
The objects moves in the direction where the force is applied. The force can make the object move and it can also make the object stop from the movement if it is in the opposite direction of the motion.
Example: Kicking the football in a forward direction will make the football move in a forward direction.
Cells such as water cells or aquatic microorganisms need and required to have a large surface area increased. Because this helps them stay afloat without spending much amount of energy to float.
