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Work and Energy

NIOS · Class 10 · Science & Tech

Quick revision notes for Work and Energy — NIOS Class 10 Science & Tech. Key concepts, formulas, and definitions for last-minute revision.

44 questions38 flashcards5 concepts

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An illustration showing three scenarios: a person pushing a wall (no displacement, no work), a person carrying a load and walking on a level road (force and displacement perpendicular, no work against
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Key Topics to Revise

1

1. Work and its conditions

  • Work is done only when force is applied and the body moves through some distance in the direction of the force.
  • No work is done if a force is applied but the body does not move.
  • No work is done if no force is applied and the body is at rest or moving with constant velocity.
2

2. Units and relation of work with energy

  • The SI unit of work is newton-metre or joule.
  • Energy has the same unit as work, joule.
  • Energy is the ability to do work.
3

3. Mechanical energy: potential energy and kinetic energy

  • Mechanical energy is the energy a body has because of its position or motion.
  • Potential energy is energy possessed by a body raised above the ground.
  • Potential energy depends on the weight of the body and its height above the ground.
4

4. Forms of energy and their examples

  • Energy is found in many forms: mechanical, thermal, light, electrical, magnetic, sound, and nuclear.
  • Thermal energy gives the sensation of hotness flowing into the body and coldness flowing out.
  • Light energy enables us to see things.

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Full Notes

Key Concepts

Work is done when forceWork done in the same directionThe SI unit of workEnergy is the ability to doMechanical energy is the energy possessed

Frequently Asked Questions

What are the important topics in Work and Energy for NIOS Class 10 Science & Tech?
Key topics in Work and Energy include Work and Energy Concept Map, Work and Energy Concept Overview, Work and Energy Concept Map. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Work and Energy — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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