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Force and Pressure — Chapter Summary

ICSE · Class 8 · Physics

Summary of Force and Pressure for ICSE Class 8 Physics. Key concepts: 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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Overview

Force is a push or pull that can change the state of rest or motion of a body, or change its size or shape. When a force acts on a body fixed at a point, it can produce a turning effect called moment of force. Pressure is the thrust acting per unit area, so the same force can create different pressu

Key Concepts

Force is a push or pull

Force is a push or pull that can change the state of rest or motion of a body, or change its size or shape. A force does not change the mass of the bo

The S

The S.I. unit of force is newton (N), named after Sir Isaac Newton. One newton is defined as the force which when applied on a moving body of mass 1 k

The moment of a force

The moment of a force is equal to the product of the magnitude of the force and the perpendicular distance of the force from the pivoted point. Formul

The S

The S.I. unit is newton metre (N m). The unit N m is not written as joule (J). Other relations are 1 N m = 10^7 dyne cm, 1 kgf m = 9.8 N m, and 1 gf c

Thrust is the force acting normally

Thrust is the force acting normally, or perpendicular, to a surface. Thrust exerted by a body on a surface is the same howsoever it is placed.

Learning Objectives

  • Define force, thrust, pressure, and moment of force
  • Explain the turning effect of a force and the role of perpendicular distance from the pivot
  • Use formulas for moment of force and pressure in numerical problems
  • Distinguish between thrust and pressure
  • Describe how pressure depends on area and thrust

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.

More resources for Force and Pressure

All ICSE Class 8 Physics Chapter Summary

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