Explain how force, energy and work are related?
Force is a push or a pull. If an object of mass
Energy can be of different forms. A moving object has Kinetic Energy, K.E, defined by the expression
An object at a height of
The energy stored in an ideal stretched or compressed spring is given by
There is a strong connection between work and energy. You can visualize this as the energy of an object for doing a work.
This is demonstrated by the expression
This can be rearranged to:
To explain it simply without any equations :
Force is like a characteristic of interaction between any set of objects. Let it be two masses, group of masses, group of charges or whatever. Depending upon type, they causes change in motion.
Energy is a measure of Inertia of the system. How much inertia the body already has decides how much he is going to respond to the above mentioned force. Assuming a uniform form - not varying - we can measure strength of force and classify it based on the action it can provide to a given chunk of mass, by moving it across a small distance and checking it. Or conversely checking how much it moved when it is allowed to move for a small time. My force can't be harder than, say undertaker's force. Because a given mass, we can move a longer distance than I do. Energy is also a kind of measure of how much a moving body changes its motion due to the force. It is either way, but is the same energy - scientists call it Potential energy and Kinectic energy respectively.
Now, switch to the perspective of the force. Given a uniform amount of inertia, how much did the force actually cause change. It depends on the mass of the object really. Hence, work done is how much Force actually did something to the object. It is the change in Energy of the system. Energy hence becomes the perspective of the body and not the force (source)