Question

How do you define the term "Work done by variable force"?​

Answer 1

Answer:

It is interesting to know that the forces we encounter every day are mostly variable in nature which is defined as a variable force. A force is said to perform work on a system if there is displacement in the system upon application of the force in the direction of the force.

Explanation:

Answer 2

Answer:

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The area enclosed by the rectangle of length equal to the magnitude of force F(x) and width equal to the displacement Δx, gives the work done by the force during that duration. ... Thus, for a variable force, the work done can be expressed as a definite integral of force over displacement for any system.