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Force and Pressure — Revision Notes

ICSE · Class 8 · Physics

Force and Pressure revision notes for ICSE Class 8 Physics: 4 topics in quick points. Key terms: Force is a push or pull, The S and The moment of a force.

43 questions42 flashcards7 formulas & key relations5 concepts

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An illustration showing two main effects of force: changing the state of rest or motion of a body, and changing the size or shape of a body, with clear examples for each.
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Key Topics to Revise

1

1. Force and its effects

  • Force is a push or pull.
  • A force can start motion, stop motion, speed up motion, slow down motion, change direction, or change size and shape.
  • A force does not change the mass of the body on which it is applied.
2

2. Turning effect of force and moment of force

  • A force can make a body rotate about a fixed point called the pivot.
  • The turning effect of force depends on the magnitude of force and the perpendicular distance from the pivot.
  • Greater force gives greater turning effect.
3

3. Thrust and pressure

  • Thrust is a force acting normally, or perpendicular, to a surface.
  • Thrust exerted by a body on a surface is the same however it is placed.
  • The effect of thrust depends on the area of the surface on which it acts.
4

4. Pressure in daily life

  • A sharp pin is easier to push into wood because its area is very small and pressure becomes large.
  • A blunt nail is harder to push in because its contact area is larger.
  • Cutting tools like knives, blades, and axes have sharp edges to increase pressure.

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Full Notes

Key Concepts

Force is a push or pullThe SThe moment of a forceThe SThrust is the force acting normally

Frequently Asked Questions

What are the important topics in Force and Pressure for ICSE Class 8 Physics?
Key topics in Force and Pressure include Force and its effects, Turning effect of force and moment of force, Thrust and pressure, Pressure in daily life. Study these first, then practise questions on each for Class 8 exams.
How should I revise Force and Pressure for Class 8 exams?
Learn the core ideas first, then work through the 43 practice questions on Force and Pressure. Revise 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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