The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
One of the most quintessential lessons in physics is work, energy, and power. Work is defined when the body produces displacement, power is a rate at which work can be done and energy is the vigor of the body to do work. The SI unit of energy and work is Joule, and the SI unit of power is Watt. So we discuss Work, Energy, and Power. We hope that you can revise and make insightful notes for your exams.
The energy of an object that it acquires due to its motion is called kinetic energy. It has magnitude and no directions. Formula for kinetic energy is:
KE = ½ mv2
Work Done by a Variable Force
Forces that we experience in our everyday life are called variable forces because they are variable and subject to change. If there is a displacement in the system due to the application of the force then, it will be called as Work Done By a Variable Force. It can be calculated as:
Fs = -kx
The Work-Energy Theorem for a Variable Force
This theorem is extracted from Newton’s second law. It expresses that the work done by the aggregate of all powers following up on a molecule approaches the adjustment in the kinetic energy of the molecule.
The energy that is caused by the object due to change in its positions is called potential energy. It depends on the force on both the objects. In other words, it is the energy produced due to the alteration of the stances. It can be constituted as:
W = m×g×h = mgh
Mechanical Energy is the aggregate of kinetic energy and potential energy in an object that is utilized to accomplish a specific work. As such, it depicts the energy of an object as a result of its movement or position, or both.
The Conservation of Mechanical Energy expresses that energy can’t be made nor destroyed, it may be changed, starting with one structure then onto the next if the powers working are conservative in nature.
The energy that is stored due to the deformation of an elastic object. The potential energy of the spring increases due to the work that is done is stretched out. The formula is:
P.E = ½ k x2
When an object comes in direct contact with others and force is wielded between the objects, it is called collisions. The two types of collisions are:
1. What is work power and energy in physics?
These are widely used terms in Physics:
2. What is the difference between work power and energy?
WorkPowerEnergyWork depends on the displacementPower depends on the timeEnergy neither depends on time nor on displacement.It refers to force appliedIt refers to work done per unit of timeIt refers to other factors like heat
3. What are the two types of Energy?
The two types of energy are:
4. Can kinetic energy of a body be negative?
No, the kinetic energy of a body can’t be negative because mass and square of speed can never be negative. Indeed, the change in kinetic energy can be negative.
Work, Energy, and Power is the first and foremost chapter in Physics that needs to be thoroughly studied to comprehend the concepts better. You need to have detailed information and a critical understanding of formulae. To get detailed information, you can check out videos on MSVgo. MSVgo is an e-learning app which has been developed to embark conceptual learning in the students from grade 6-12. MSVgo has been providing the students with a core understanding of the concepts. I It is an app with a video library that explains concepts with examples or explanatory visualizations or animations. Watch, Learn, and Grow!!