In physics, work is defined as the product of force and displacement in the direction of the force. It is a measure of energy transfer that occurs when a force is applied over a distance.
Work and energy are closely related concepts in physics. Work is the transfer of energy from one object to another, or from one form to another. The work done on an object is equal to the change in its energy.
Yes, work can be negative. This occurs when the force applied is in the opposite direction of the displacement. In this case, work is considered to be done against the force, resulting in a decrease in energy.
The unit of measurement for work is joules (J) in the International System of Units (SI). This is equivalent to a force of one newton (N) applied over a distance of one meter (m).
The direction of work is determined by the direction of the force and the displacement. If the force and displacement are in the same direction, then the work is considered positive. If they are in opposite directions, then the work is considered negative.