# The Joule

In physics, work is energy that is transferred from or to an object through the use of force along a change in distance. In its most simple form, it can be symbolized as the result of two forces acting on an object and their difference. The concept of work has become central to our understanding of how the world works. Without it, we would have no idea how to move things from one place to another or how to make machines to perform certain tasks.

To explain how work relates to the environment, we need to consider what happens when there is a constant force on an object. Put simply, if you have something on the ground and someone is sitting on it, while there’s a constant force acting downwards, then you would see that the top of the table would rise above the person sitting at the bottom because the force is decreasing. Similarly, if you have something on the floor and someone is sitting down, while there’s a constant force acting upwards, the bottom of the table would rise above the person sitting down because the force is increasing. If we graph this out, we get something of interest: the slope of the surface below and above the person depending on how much work has been done.

Work is caused by the force of gravity pulling down an object, which creates a downward force that acts to increase the slope of the surface. If the force of gravity is constant, then the surface will remain flat forever. Under normal circumstances, there shouldn’t be any downward force, because the only time the surface changes is when a massive body of fluid comes rolling over it such as when a river overflows or when it gets close to the ground. But because of the Law of Conservation of Energy, the downward force is a constant, which causes the surface to dip or roll slightly.

Put simply, there is a constant force on an object no matter what its orientation. That force can be measured in Joules ( Units/ Moment, Nits/kg), and is equal to the weight of an object times its density. We can measure the amount of force by dividing it by the weight of the subject. Joules are a way of expressing force per unit of area or pertains to the power of gravity times the weight of the subject.

A higher Joule is a higher measure of force because there are more derivatives of the force. For example, a lower Joule is equal to a higher displacement, but a higher Joule doesn’t necessarily mean that there is more work done. The actual power of the derivative is just the difference between the derivative’s values times the derivative’s values. Therefore, a Joule basically expresses the amount of work done by separating the work done into its component parts.

The Law of conservation of energy tells us that the total amount of energy, that a subject exerts, is conserved. We can measure this force by multiplying the force with the displacement, and getting the value of the conserved force times the derivative of the force. We can also divide the work done by the displacement to get the amount of energy. Therefore, if the work done is divided by the displacement, then we can calculate the conserved energy. A perfect Joule measures the exact amount of energy that is conserved, and it is a good concept to remember for designing and building mechanical systems such as cars, airplanes, and so forth.

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