Work, Energy and Power
CBSE · Class 11 · Physics
Step-by-step guide to study Work, Energy and Power in CBSE Class 11 Physics. Topics to cover, practice strategy, and time allocation.
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Study Plan
Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 138 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Work, Energy and Power after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- Dot product: A · B = AB cos θ
- Work: W = Fd cos θ
- Work is scalar and may be positive, negative, or zero
- Work-energy theorem: change in kinetic energy equals work done by net force
- For constant force: Kf − Ki = W
- The theorem follows from Newton’s Second Law
- K = 1/2 mv2
- Kinetic energy depends on mass and speed
- Kinetic energy is scalar
Common Mistakes to Avoid
Work is done whenever a force is applied, even if there is no displacement.
Work done by action-reaction forces must always be equal and opposite.
Positive work means the force must be large, and negative work means the force is bad or incorrect.
Memory Tips
Work and energy have the same dimensions and unit
Power and its unit
No work is done in three special cases
Positive and negative work
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Work, Energy and Power
Practice Quiz
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Important Questions
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Revision Notes
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Formula Sheet
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Chapter Summary
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Concept Maps
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Flashcards
Quick-fire cards for active recall
Syllabus
What topics to cover
NCERT Solutions
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Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for CBSE Class 11 Physics.