Question

What are the different types of work?

Answer 1

Hint:-In order to this question, to know the different types of work, first we will discuss the work and its units and then we will also represent numerically. And then we will discuss the three types or conditions of work done.

Complete answer:
Work is defined as the force acting on a body that causes the body to move. Work is defined as the dot product of force and displacement and is measured as a constant force. Work is a physics term that describes the energy transfer that occurs when an object is moved over a distance by an external force that is applied in at least part of the displacement direction.

Work can be calculated by multiplying the length of the path by the component of the force acting along the path if the force is constant. Work is represented numerically by-
\[W = F.S.cos\theta \]
where, $F$ is the force,$S$ is the displacement and $\theta $ is the angle between $F$ and $S$.

Work is the product of two vector values and is a scalar quantity. Depending on the value of $\theta $ , there are three types of work:
(i) When $\theta = {0^\circ }$, work is said to be positive. Because the force acts in the direction of the spring's displacement, stretching it is an example of positive labour.
(ii) When $\theta = {180^\circ }$, work is said to be negative. Because the frictional force acts in the opposite direction, it is an example of negative work.
(iii) When $\theta = {90^\circ }$, work is said to be zero. The force will be at the appropriate angle for a body moving in a circular direction with a centripetal force acting on it at zero speed.

Note: Work on a body equals an increase in the body's energy, because work delivers energy to the body. If the applied force, on the other hand, is in opposition to the object's motion, the work is regarded negatively, suggesting that energy is withdrawn from the item.