Introduction
Work and Energy Class 9- Work and Energy lesson is an important topic in the standard of 9th class standard. It was a topic that explained the fundamental related topics present in physics. which gives more information about the movement of forces and also the energy present, and the purposes of different forms of energy. It can be observed in our daily life activities by moving and work done without knowing the response in the mind. From this topic, we can get a clear and brief account of information related to the work done and the energy used to complete the work.
What is meant by work?
We can get a brief account of information in regular ways. When we move from one place to another, the force is applied by using certain energy. Here, the force that was applied was key to completing the work. It can be demonstrated as the force applied on an object in which the object to be transferred from one place to another by the applied force, and changes its position and movement. Here, there are conditions where applied like force must be applied to an object. By applying force, the displacement occurs; we can estimate the occurrence of force and displacement at one point over time.
formula for work done
as explained above, the work can be calculated by the force and the important step displacement.
- where work =force x displacement
According to the law of newtons, F is called the applied force, and displacement can be calculated in the form of meters
Units of work can be estimated in the form of joules.
There are also types the work done and its formation. They are positive work, negative work, and non it means zero work. There are many types, whereas these three are the major types in the calculation of the work.
Energy
To finish the work, a capacity was required for a person. with out the energy the force can’t applied on the object, there is no chance for displacement and movements of the object that occur on the object.to deal with physically, either to complete the work, the energy was essential to move forward, and to take the next step. The work done was completely dependent on any one or multiple types of energy. the whole living organisms require a minimum amount of energy to do work, either to finish completely or remain unfinished.
Forms of energy
The formation of energy can be estimated into different types. They are as follows
- light energy
- heat energy
- electrical energy
- chemical energy
- mechanical energy
- potential energy
- kinetic energy
Light energy
Light is essential in the process of completing the work. Due to the presence of light, there are many advantages and disadvantages. Light energy is one of the types of energy that is produced by electrical vibrations and particles converted into light energy. There are some types of light energy, like visible light, UV rays, infrared light, and invisible light, etc. Light energy also consists the properties like frequency, wavelength, intensity, formation of the phasesand polarization. There are many uses of light energy, like
Uses of the light energy
- growth of the living organisms
- temperature and heat
- formation of food
- Killing the harmful microorganisms
- vitamins
- process of sterilization
Heat energy
It was a well type of one type of common energy that contained both advantages and disadvantages. It was a form of energy caused by the motions and converted into thermal energy. Heat energy can be demonstrated by the presence of atoms and molecules, solids, liquids, and gases. The temperature an essential to know the estimation of the heat energy. Low temperature and high temperature are present based on the presence of heat.
The substance movement changes due to the presence of the heat, and we can also observe some release of harmful gases and aspects to the environment. The heat energy transferred by convection, radiation, and conduction further processes. The heat energy comes the sources like death, the sun, the air, electricity, and fuels. Most of the heat is generated from the sun and from the Earth. Due to toxic chemicals, the heat produced by the fossils and industries, and the fuels.
Electrical energy
It is a common type of energy in which electricity is produced due to the presence of kinetic and potential energy. It can be calculated in the form and joules, and it is symbolized as E. We can observe electricity in the solar panels, batteries, electric rays, capacitors, etc. There are major advantages and disadvantages of electricity which produced from electrical energy. The uses of the electrical energy like cooling, heating, operating the machines, lightning purpose and transportation, like vehicles. The speed of the electrical energy huge and can distract any compounds within a shorter amount of time.
Chemical energy
The actions occurred between the different types of chemicals, in which the newer substance or the product was produced. The energy is produced when a reaction occurs between the different chemicals. The chemical energy was present in our food and daily lifestyle. At some like wood, when we burn it the the energy is transformed from one form of energy. The solid materials were converted into liquid, and the gas was formed while burning of the wood was burned. In humans, the chemical energy is also used to convert the solid particles of food through the process of digestion by the conversion.
Mechanical energy
The mechanical energy can be demonstrated in the major energies, like as kinetic energy and potential energy. The kinetic energy and potential energy are very closely related to each other and are involved in the process of mechanical energy. We can observe the mechanical energy everywhere while moving from one to another or while playing, and doing a type of work. The objective position even changes in the form of energy that is produced and claimed. The speed is also very key and calculated in this type of mechanical energy.
Potential energy
It was a common and well known type of the one of the common type of energy. It can be dedicated as the object placement changes in the presence of different energies, and can observe the changes in the body of the object. There are several types related to potential energy, like gravitational potential energy, elastic, and electrostatic potential energy. The mass of an object was also key, and height acceleration due to gravity was key in this potential energy. It can be demonstrated by the examples are as stretching a rubber band, a bow, which is stretchable, driving in the river, motors, and generators with the help of air flow.
Kinetic energy
There are several types of energies, and this kinetic energy was key to moving the object from one state to another. Motion is very prominent in this kinetic energy, which accelerates and possesses the movement of an object. Based on the distance, the time velocity management of the nuclear energy, chemical energy can be estimated. Gradient energy, thermochemical energy, and energy generated by sound are the key sources of kinetic energy. The energy can be estimated by mass, and units are in the form of joules. The proper velocity is needed to observe further movements and estimate the process of kinetic energy.
conclusion
These are some of the key points related to the work and energy lesson. In this article, you have a proper output related to the topic of work and energy. This article gives a clear insight into the major steps and sources are involved in doing work with the help of energy.