NCERT Solutions for Class 9 Science Chapter 11 Work and Energy
NCERT solutions for class 9 science chapter 11 Work and Energy: These solutions will give you a better understanding of concepts present in this chapter through various real life examples, such as, when a person is holding a bucket of water for 10 minutes, we can say, he is physically doing work but according to Physics he is not doing work because bucket has no displacement. The CBSE NCERT solutions for class 9 science chapter 11 Work and Energy will clear your concept of work in physics with a condition to say that a work has been done by a force. The solutions for NCERT class 9 science chapter 11 Work and Energy will provide you with an overview of the complete chapter and NCERT solutions can help you walk through other chapters and other subjects also if you wish to study. Below you can check some questions and answers which will help you to clear your concepts.
Latest : Trouble with homework? Post your queries of Maths and Science with step-by-step solutions instantly. Ask Mr AL
When work is said to be done?
Work is said to be done when a force is applied and due to the force, the objects have a displacement.
If F is the constant force acting on the object and S is the displacement then work W= FS. The unit of work is Joule and 1 Joule= 1N m.
An important topic of NCERT Solutions for Class 9 Science Chapter 11 is :
Energy: Energy is the capability of doing work. The unit of energy is the same as that of energy.
Kinetic Energy: The kinetic energy of an object moving with a certain velocity is the work done on the object to acquire that velocity. Suppose initial velocity of an object is u, by applying a constant force we changed the velocity to v. Let the acceleration due to force be a and S be the displacement then work done.
This work done is known as kinetic energy
If the body starts from rest then u=0 then the kinetic energy
Potential Energy: Potential energy of an object is the energy possessed by an object due to its position. The gravitational potential energy of an object at a point above the ground is defined as the work done in raising it from the ground to that point against gravity. Suppose the mass of the object raised is m and the height to which object is raised is h then,
Potential Energy = mgh
One of the main topics of NCERT Solutions for Class 9 Science Chapter 11 Work and Energy is given below:
Work-Energy Theorem: When energy gets transformed total energy gets conserved. That is energy can neither be created nor be destroyed. For example, When we open a tape the potential energy stored in the water tank at height is converted to the kinetic energy of the water. When an electric fan is working electrical energy is converted to mechanical energy and certain energy are lost in the form of heat.
Important Topics of NCERT Solutions for Class 9 Science Chapter 11 Work and Energy:
11.1.2 Scientific Conception Of Work
11.1.3 Work Done By A Constant Force
11.2.1 Forms Of Energy
11.2.4 Potential Energy Of An Object At A Height
11.2.5 Are Various Energy Forms Interconvertible?
11.2.6 Law Of Conservation Of Energy
11.3 Rate Of Doing Work
11.3.1 Commercial Unit Of Energy
Power: The rate of doing work is Power. Power measures the speed of work done, that is, how fast or slow work is done. If an agent does a work W for time t, then power
The unit of power is watt.
Commercially electric bills are calculated in terms of unit and 1 unit= 1Kilo Watt-hour
That is if equipment with power rating 1 KW is operated for 1 hour then it consumes 1 unit of energy.
NCERT solutions for class 9 science chapter 11 Work and Energy: Solved In-text Questions-
NCERT Solutions for Class 9 Science- Chapter Wise
NCERT Solutions for Class 9 - Subject Wise
How to Use NCERT Solutions for Class 9 Science Chapter 11 Work and Energy?
- If you want to score well in your exam then the practice should be the only way which will help you to get high scores in the CBSE class 9 science exam.
- While preparing for the exam, you must go through the NCERT solutions for class 9 science chapter 11 Work and Energy. Since in your exams, there will be direct questions from the NCERT textbook.
- The solutions are created by experienced science faculty as per the CBSE guidelines.
Bihar Open Board will release BBOSE admit card 2021 for Decemb...
TN 11th Time Table 2021 - Directorate of Government Examinatio...
PSEB 8th Date Sheet 2021 - Punjab Board will release the Class...
IEO Result 2020-2021 - Science Olympiad Foundation will releas...
Kendriya Vidyalaya Bangalore Admission 2021 - Know the admissi...
iOM Result 2020-21 - Silverzone International Olympiad of Mat...
IOEL Result 2020-21 - SilverZone Foundation will release the r...
Kendriya Vidyalaya Pune Admission 2021 - Check the admission p...
JAC Cass 9th Syllabus 2020-2021 - Students can download Jharkh...