Curriculum

25 Sections
92 Lessons
70 Hours

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1.1 - Physical quantities and measurement techniques
5
- 1.1
  Use of rulers and measuring cylinders to find a length or a volume
- 1.2
  Describe how to measure a variety of time intervals using clocks and digital timers
- 1.3
  Determine an average value for a small distance and for a short interval of time by measuring multiples (including the period of oscillation of a pendulum)
- 1.4
  Quiz Test 1Copy
  10 Minutes2 Questions
- 1.5
  TestCopy
1.2 - Motion
4
- 2.1
  Distance, displacement, speed, velocity and acceleration (basic terms of motion)Copy
- 2.2
  Graphical representation of motionCopy
- 2.3
  Acceleration of free fall (Gravitational acceleration g = 9.8 m/s^2)Copy
- 2.4
  Motion of bodies in uniform gravitational field with air resistanceCopy
1.3 - Mass and weight
1
- 3.1
  Mass and weight ( Basic concepts and differences)Copy
1.4 - Density
1
- 4.1
  Calculating and measuring the densities of different objects, (effects of density)Copy
1.5 - Forces
5
- 5.1
  Effects of forcesCopy
- 5.2
  Turning effectCopy
- 5.3
  Condition for equilibriumCopy
- 5.4
  Centre of massCopy
- 5.5
  Scalar and vectorsCopy
1.6 - Momentum
1
- 6.1
  Momentum and its conservation in an isolated systemCopy
1.7 - Energy, work and power
5
- 7.1
  Different forms of energy and the energy conservationCopy
- 7.2
  Energy resourcesCopy
- 7.3
  WorkCopy
- 7.4
  PowerCopy
- 7.5
  Self assessmentCopy
1.8 - Pressure
1
- 8.1
  Pressure and its measurementCopy
2.1 - Kinetic particle model of matter
5
- 9.1
  States of matterCopy
- 9.2
  Molecular modelCopy
- 9.3
  EvaporationCopy
- 9.4
  Pressure changesCopy
- 9.5
  Self assessmentCopy
2.2 - Thermal properties and temperature
5
- 10.1
  Thermal expansion of solids, liquids and gasesCopy
- 10.2
  Measurement of temperatureCopy
- 10.3
  Thermal capacity (heat capacity)Copy
- 10.4
  Melting and boilingCopy
- 10.5
  Self assessmentCopy
2.3 - Transfer of thermal energy
5
- 11.1
  ConductionCopy
- 11.2
  ConvectionCopy
- 11.3
  RadiationCopy
- 11.4
  Consequences of Energy TransferCopy
- 11.5
  Self assessmentCopy
3.1 - General properties of waves
6
- 12.1
  Basic characteristics and common features of wavesCopy
- 12.2
  Transverse and longitudinal wavesCopy
- 12.3
  Recall and use the equation v = f λCopy
- 12.4
  Reflection of wavesCopy
- 12.5
  Refraction of wavesCopy
- 12.6
  Diffraction of wavesCopy
3.2 - Light
7
- 13.1
  Nature of light and its basic featuresCopy
- 13.2
  Reflection of lightCopy
- 13.3
  Image produced by the plan mirrorCopy
- 13.4
  Refraction of lightCopy
- 13.5
  Image produced by the convex lensCopy
- 13.6
  Dispersion of lightCopy
- 13.7
  Self assessmentCopy
3.3 - Electromagnetic spectrum
2
- 14.1
  Characteristics of electromagnetic spectrumCopy
- 14.2
  Self assessmentCopy
3.4 - Sound
3
- 15.1
  Basic characteristics of sound wavesCopy
- 15.2
  Experiment to measure the speed of sound wavesCopy
- 15.3
  Self assessmentCopy
  10 Minutes4 Questions
4.1 - Simple phenomenon of magnetism
3
- 16.1
  Magnets and its characteristicsCopy
- 16.2
  Methods of magnetisation and demagnetisationCopy
- 16.3
  Design and use of permanent magnets and electromagnetsCopy
4.2 - Electrical quantities
5
- 17.1
  Electric chargeCopy
- 17.2
  Electric currentCopy
- 17.3
  Electromotive force (emf) and potential differenceCopy
- 17.4
  Resistance and Ohm’s lawCopy
- 17.5
  Electrical energy and electrical powerCopy
4.3 - Electric circuits
7
- 18.1
  Circuit diagram – Circuit components and their functionsCopy
- 18.2
  Effective or equivalent resistance in series and parallel circuitsCopy
- 18.3
  Behaviour of series and parallel circuitsCopy
- 18.4
  Function of LDR (Light Dependent Resistor) and thermistorCopy
- 18.5
  Potential divider and potentiometerCopy
- 18.6
  Use of relay in a circuitCopy
- 18.7
  Diode in half and full wave rectifier bridgeCopy
4.4 - Electrical safety
2
- 19.1
  Hazards and dangers of electrictyCopy
- 19.2
  Fuses and circuit breakersCopy
4.5 - Electromagnetic effects
6
- 20.1
  Electromagnetic inductionCopy
- 20.2
  The magnetic effect of a currentCopy
- 20.3
  A.C. GeneratorCopy
- 20.4
  TransformerCopy
- 20.5
  Force on a current-carrying conductorCopy
- 20.6
  D.C. MotorCopy
5.1 - The nuclear model of the atom
2
- 21.1
  Atomic modelCopy
- 21.2
  NucleusCopy
5.2 - Radioactivity
5
- 22.1
  Detection of radioactivityCopy
- 22.2
  Characteristics of the three kinds of emissionCopy
- 22.3
  Radioative decayCopy
- 22.4
  Half life of radioactive elementsCopy
- 22.5
  Safety precautionsCopy
6.1 - Earth and the Solar System
2
- 23.1
  6.1.1 The Earth
- 23.2
  6.1.2 The Solar System
6.2 - Stars and the Universe
3
- 24.1
  6.2.1 The Sun as a star
- 24.2
  6.2.2 Stars
- 24.3
  6.2.3 The Universe
Paper 6 instructions
3
- 25.1
  Safety precautions and improvementsCopy
- 25.2
  GraphsCopy
- 25.3
  Graphs 1Copy

Cambridge IGCSE Physics

Turning effectCopy

Learning Objectives

Describe the moment of a force as a measure of its turning effect and give everyday examples
Understand that increasing force or distance from the pivot increases the moment of a force
Calculate moment using the product, force × perpendicular distance from the pivot
Apply the principle of moments to the balancing of a beam about a pivot
Apply the principle of moments to different situations

Contents to learn

Moment of force
The turning effect of force is called moment of force.

The moment of force depends on the following factors.

The size (magnitude) of the force
The perpendicular distance between the line of action of the force and the turning point which is called the pivot.
We calculate the moment of force by using the following formula

Moment of force = force * perpendicular distance from pivot to the line of action of the force
Moment=F * d

Moment is measured in newton meters(Nm).

Priciple of moment of force
This principle states that “if a system of force is not turning (or if the system is in equilibrium) then the algebaric sum of the all clockwise moments is equal to the algebaric the sum of all anticlockwise moments about any point”.

Sum of clockwise moments = sum of anticlockwise moments

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