In this revision guide, you will find the most important and hardest topics in the Edexcel IGCSE Physics 9-1 syllabus summarized not only in the easiest form but along with diagrams and important past paper questions. Rest assured this revision guide will help you achieve that grade 9 you have been...
,Physics can be quite a hard
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With so many formulas and rules to remember physics can be quite a
difficult subject, however this document right here will make your life
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In this document you will see the most important topics needed in igcse
edexcel physics explained in not only detail but with diagrams and
important questions from recent years
A list of all necessary equations and formulas have also been given
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2
, Units and symbols
SI unit Symbol
Power Watts W
Work done joules J
Energy joules J
Current amps A
Charge coulombs C
Resistance ohms Ω
Voltage volts V
Pressure pascal Pa or N/m2
Distance metres m
Time seconds s
Speed or velocity - m/s
Momentum - Kg m/s
Moment - Nm
Acceleration - m/s2
Force newtons N
Density - Kg/cm3
Weight newtons N
Frequency hertz Hz
Radioactivity Becquerel Bq
Temperature Celsius or Kelvin °C or K
1. Forces and motion
Forces, movement, shape and momentum
What effect does a force have on an object?
3
, Changes object’s speed
1. -
Changes object’s direction
2. -
Changes object’s shape
3. -
What is gravity?
The force of attraction between all masses
What is weight?
The force of gravity pulling the object towards the center of the Earth
What is the difference between weight and mass?
On Earth or Mars an object will have the same mass but the weight will be different
Weight is a force and mass is not
Weight is measured in newtons and using newton meter and spring balance while mass is
measured in kilograms using a mass balance
What does gravity do?
1. Keeps objects in orbits
2. On the surface of a plant gravity makes all things accelerate
3. Gravity gives everything a weight
List the different types of forces
Gravitational - force acting downwards
-
Electrostatic - force between charged objects, like charges repel opposite charges
-
attract
Weight
-
Reaction force - force acting perpendicular to a surface and away from it therefore if the
-
surface is horizontal the reaction force acts upwards
Friction
-
Air resistance
-
Upthrust
-
Nuclear
-
Magnetic
-
Why dont we notice the forces acting on our body?
As all of the forces are balanced out
How to reduce friction?
1. Use lubricants
4
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