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Work, Energy and Power class 11 Notes Physics

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CBSE class 11 Physics Chapter 6 Work, Energy and Power notes in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides  Work, Energy and Power class 11 Notes latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 11 Physics notes on Chapter 6 Work, Energy and Power are also available for download in CBSE Guide website.

CBSE Guide Work, Energy and Power class 11 Notes

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11 Physics notes Chapter 6 Work, Energy and Power

Download CBSE class 11th revision notes for Chapter 6 Work, Energy and Power in PDF format for free. Download revision notes for Work, Energy and Power class 11 Notes and score high in exams. These are the Work, Energy and Power class 11 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the the best tips recommended by teachers during exam days.

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CBSE Class XI PHYSICS
Revision Notes
CHAPTER 6
WORK, ENERGY AND POWER CLASS 11 NOTES

  1. Notions of work, work-energy theorem, power
  2. Kinetic energy
  3. Potential energy
  4. The conservation of Energy
  5. Non-conservative forces-Motion in a vertical circle, Collisions

SUMMARY

1. The work-energy theorem states that the change in kinetic energy of a body is the workdone by the net force on the body.

2. A force is conservative if (i) work done by it on an object is path independent anddepends only on the end points {xi, xj}, or (ii) the work done by the force is zero for anarbitrary closed path taken by the object such that it returns to its initial position.

3. For a conservative force in one dimension, we may define a potential energy function V(x)such that

4. The principle of conservation of mechanical energy states that the total mechanicalenergy of a body remains constant if the only forces that act on the body are conservative.

5. The gravitational potential energy of a particle of mass m at a height x about the earth’s surface is V(x) = m g x

where the variation of g with height is ignored.

6. The elastic potential energy of a spring of force constant k and extension x is

7. The scalar or dot product of two vectors A and B is written as A. B and is a scalar quantity given by : A.B = AB cos , where  is the angle between A and B. It can be positive, negative or zero depending upon the value of . The scalar product of two vectors can be interpreted as the product of magnitude of one vector and component of the other vector along the first vector. For unit vectors :

Scalar products obey the commutative and the distributive laws.

Physical Quality SymbolDimensionsunitsRemarks
WorkWJW=F.d.
Kinetic EnergyKJ
Potential energyV(x)J
Mechanical energyEJE= K+V
Spring ConstantK
PowerPWP=F.v

Work, Energy and Power class 11 Notes

  • CBSE Revision notes (PDF Download) Free
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  • Quick revision notes for CBSE board exams

CBSE Class-11 Revision Notes and Key Points

Work, Energy and Power  class 11 Notes. CBSE quick revision note for class-11 Physics, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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