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Physics

  • IGCSE Edexcel
  • Revision Notes

1. Forces & Motion

1.1 Movement and Position>1.2 Forces, Movement, Shape and Momentum>

2.1 Mains Electricity >2.2 Energy and Voltage in Circuits >2.3 Energy Charge >

3.1 Properties of Waves >3.2 The Electromagnetic Spectrum >3.3 Light and Sound >

4.1 Energy Transfers >4.2 Work and Power >4.3 Energy Resources and Electricity Generation >

5.1 Density and Pressure >5.2 Change of State >5.3 Ideal Gas Molecules >

6.1 Magnetism >6.2 Electromagnetism >6.3 Electromagnetic Induction >

7.1 Radioactivity >7.2 Fission and Fusion >

8.1 Motion in the Universe >8.2 Stellar Evolution >8.3 Cosmology >

1.1 Movement and Position

1.1.1 Use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s) and newton/kilogram (N/kg)

Quantity Symbol SI Unit
Mass m Kilograms (kg)
Distance d Metres (m)
Velocity v Metres per second (m/s)
Acceleration a Metres per second squared (m/s2)
Force F Newtons (N)
Time t Seconds (s)
Gravitational Field Strength g Newtons per kilogram (N/kg)

1.1.2 Use the following units: newton metre (Nm), kilogram metre/second (kg m/s)

Quantity Symbol SI Unit
Moments

M

 Newton metre (Nm)
Momentum p Kilogram metre per second (kg m/s)

1.1.3 Plot and explain distance−time graphs

1.1.4 Know and use the relationship between average speed, distance moved and time taken:

1.1.5 Practical: investigate the motion of everyday objects such as toy cars or tennis balls

Apparatus needed:

  • Stopwatch
  • Metre ruler or tape measure
  • Marker or pen

Method:

  • Mark starting point and end point with marker
    Measure distance with metre ruler or tape measure
  • Line up front of toy car with starting point
  • Release the car and start the stopwatch
  • Stop stopwatch when the front of the toy car reaches the end point
  • Repeat steps and average results for reliability
  • Calculate speed

Control variables:

  • Ensure that the toy car starts from a stationary speed
  • Use same stopwatch for accuracy

1.1.6 Know and use the relationship between acceleration, change in velocity and time taken: acceleration = change in velocity/time taken

1.1.7 Plot and explain velocity−time graphs

The area under the the graph is equal to the distance travelled.

1.1.8 Determine acceleration from the gradient of a velocity−time graph

 

1.1.9 Determine the distance travelled from the area between a velocity−time graph and the time axis

1.1.10 Use the relationship between final speed, initial speed, acceleration and distance moved:

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