Work, Energy and Power – Definition, Formula, Relation
Work, Energy, and Power are some of the most essential topics in the Physics subject, as many other important topics or chapters are derived or connected to these quantities. So, to get a better score in this subject it is important for the students to have a better understanding of these quantities, and how they work. Thus, here in the article below to help you out, we have put together detailed information on Work, Energy, and Power.
What is Work?
If an object sees a change in direction or speed, due to the application of external force, then the work is said to be done. Moreover, the work done on an object is measured by-product of displacement and force on a body along the direction of the force. For instance, when a person eats food, he/she will get the energy to perform his daily tasks or duties. Besides, Work is a scalar quantity, and its unit of work is Joule.
Furthermore, the work done on an object depends on two factors, such as,
- The direction of the body is due to the application of external forces.
- The magnitude of force.
Mathematically, work is defined as,
Work = F*S
However, you must remember that force does not always result in work done, as it can only be possible if there is displacement, and a change in direction is observed.
What is Energy?
Energy is defined as the ability to get work done or perform a task. For instance, if you want to go for a walk, you need energy. Moreover, energy is said to be a scalar quantity, because it does not have direction only magnitude. Besides, there are many forms of energy, such as
- Chemical Energy
- Kinetic Energy
- Heat Energy
- Thermal Energy
- Electric Energy
- Mechanical Wave Energy
- Gravitational Energy
- Elastic Energy
- Radiant Energy
- Ionization Energy
- Mechanical Energy
- Nuclear Energy
Similar to the Work done, the energy is also measured in the units of Joule.
What is Power?
Power is described as the rate of doing work, or the amount of energy consumed per unit of time. Similar to other quantities, Power does not have a direction, which is it is referred to as a scalar quantity. And moreover, depending on the purpose or functions, and application, the power can be described in many different ways.
Mathematically, Power is expressed as,
\(P= \frac{W}{T} \)
Where P = Power
W = Work Done
T = Time Taken
S.I Unit of Power is Joules/Second, which can be measured as Watts.
Conclusion
The above article helped you understand all about Work, Energy, and Power, the formula, definition, and relationship between them in Work, Energy, and Power in much more detail. However, while studying these chapters, you must remember that they need to spend more time memorizing them, as they are very complex to understand. And if you are finding similar struggles in Physics, then it is better for you to join the online interactive classes offered by the Tutoroot platform. As they offer access to the best educational guides, expert staff, and customizable sessions, which will help you improve your knowledge of the subject.