Work-Energy theorem is a fundamental basis of handling problems involving physical situations in

several domains of physics where energy transformations take place. Whenever some work is done by a

force it is equal to the decrease in energy of the agent who is doing the work and same amount of

energy increases in the body/agent on which work is done.

If work is done on/by a rigid body, it is equal to change in kinetic energy of body if only mechanical

energy is involved as rigid body cannot store potential energy in its own. This is the basis we use for

application of Work-Energy Theorem while using it for rigid bodies.

To understand basics of Work-Energy Theorem follow the video – https://youtu.be/uvNZu1yy9Co

Relation in Potential Energy and Force: We know that Potential Energy is a characteristic of

Conservative force fields only where no dissipation of energy take place. Whenever some work is done

on or by an external agent in a conservative force field, this work is always equal to change in stored

potential energy of the force field. Based on this concept we can deduce the relation in potential energy

and force.

See the video for details – https://youtu.be/QBM0U-6vkzk

To understand the same with applications of the above logic, see the example videos below –

https://youtu.be/JDHXK0Os9Zc

https://youtu.be/HnSAXmHVxRc

https://youtu.be/-Y3o4PZmV_I

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