Question

Define a work done by a force and give some examples of it.

Answer 1

Force is defined as the product of the displacement of the object.
If force and displacement are perpendicular then the work becomes zero
If the force and displacement are opposite ways then the work becomes positive.

Complete answer:
The work done by any force acting on an object is a method of transferring the energy to the object and depends on both the force and displacement.
Generally, the work done by a force is calculated by integrating the component's force in the direction of the displacement to the displacement of the object itself. when the displacement is in the same direction as the applied force then the force is constant.
the magnitude of the force times the total displacement can be written as,
$W = F\Delta x$,
Where,
$F$ is the magnitude of the constant force
$\Delta x$ is the displacement of the object
For example, if we pushed a book across the table with a constant force, we would just multiply that force times how far we pushed the book.
Finally, An example of work done by a constant force is the work done by a constant force $2N$ on an object having a mass $3kg$.

Note: Work done due to a force is calculated as the product of the force applied and displacement in the direction of the force applied.
when the force is applied exactly in the same direction then the maximum work is done as the direction of motion of the object
we know that the Work is the multiple of force and displacement should the force be acting in the same direction as the displacement.