Physics GCSE Revision Notes:
,Index:
Equations: 2-3
Forces & Motions: 4 - 11
Electricity: 12 - 26
Waves: 27 - 38
Energy Resources & Energy Transfers: 39 - 45
Solids, Liquids & Gases: 46 - 51
Magnetism & Electromagnetism: 52 - 60
Radioactivity, Fission & Fusion: 61 - 68
Astrophysics: 69 - 76
1
,Physics GCSE Equations:
Energy Resources & Energy Transfers:
- Energy = Power x Time
- Power = Voltage x Current
- Energy = Voltage x Current x Time
- Energy Efficiency = Useful Energy / Total Energy x 100
- Work Done = GPE = Kinetic Energy
- Work Done = Energy Transferred
- Work Done = Force x Distance moved in direction of the force
- GPE = Mass x Height x Gravitational Field Strength
- Kinetic Energy = ½ (Mass x Speed^2)
- Mass x Height x Gravitational Field Strength = ½ (Mass x Speed^2)
- Power = Work Done / Time
Forces & Motion:
- Force = Mass x Acceleration
- Force = (Mass x Final Velocity) - (Mass x Initial Velocity) / Time
- Force = Change in Momentum / Time
- Momentum before Collision = Momentum after Collision
- Momentum = Mass x Velocity
- Moment of a Force = Force x Perpendicular Distance from the Pivot
- Final Speed^2 = Initial Speed^2 + 2 x Acceleration x Displacement
- Acceleration = Final Velocity - Initial Velocity / Time
Electricity:
- Power = Voltage x Current
- Energy = Current x Voltage x Time
- Charge = Current x Time
- Energy Transferred = Charge x Voltage
- Potential Difference = Energy / Charge
Dynamics:
- Force = Spring Constant x Extension
- Reaction Time = Time taken to react to a hazard
- Thinking Distance = Distance travelled during the reaction time
- Braking Distance = Distance travelled when braking
- Stopping Distance = Braking Distance + Thinking Distance
Waves:
- Wave Speed = Frequency x Wavelength
- Frequency = 1 / Time Period
2
, - Refractive Index n = Sin i / Sin r
- Refractive Index n = Speed of Light in a Vacuum / Speed of Light in a Material
- Speed of Light in a Vacuum = 300,000,000 m/s
- Critical Angle = Sin^-1 (1 / Refractive Index)
- Speed of Sound = Distance between 2 Mics / Time from Mic 1 to Mic 2
Magnetism & Electromagnetism:
- Primary Coil Voltage (Vp) / Secondary Coil Voltage (Vs) = Number of Primary Turns
(Np) / Number of Secondary Turns (Na)
- Primary Coil Voltage x Primary Coil Current = Secondary Coil Voltage x Secondary
Coil Current
- Voltage = Current x Resistance
- Power = Current x Voltage
Solids, Liquids & Gases:
- Density = Mass / Volume
- Pressure = Force / Area
- Pressure Difference = Height x Density x Gravitational Field Strength
- Change in Thermal Energy = Mass x Specific Heat Capacity x Change in
Temperature
- Pressure = Constant x Temperature in Kelvin
- Initial Pressure / Initial Temperature = Final Pressure / Final Temperature
- Pressure x Volume = Constant
- Initial Pressure x Initial Volume = Constant = Final Pressure x Final Volume
Astrophysics:
- Orbital Speed = (2 x π x Orbital Radius) / Time Period
- Weight = Mass x Gravitational Field Strength
- Change in Wavelength / Reference Wavelength = Velocity of a Galaxy / Speed of
Light
- (λ - λ0) / λ0 = Δλ / λ0 = v/c
3
,Index:
Equations: 2-3
Forces & Motions: 4 - 11
Electricity: 12 - 26
Waves: 27 - 38
Energy Resources & Energy Transfers: 39 - 45
Solids, Liquids & Gases: 46 - 51
Magnetism & Electromagnetism: 52 - 60
Radioactivity, Fission & Fusion: 61 - 68
Astrophysics: 69 - 76
1
,Physics GCSE Equations:
Energy Resources & Energy Transfers:
- Energy = Power x Time
- Power = Voltage x Current
- Energy = Voltage x Current x Time
- Energy Efficiency = Useful Energy / Total Energy x 100
- Work Done = GPE = Kinetic Energy
- Work Done = Energy Transferred
- Work Done = Force x Distance moved in direction of the force
- GPE = Mass x Height x Gravitational Field Strength
- Kinetic Energy = ½ (Mass x Speed^2)
- Mass x Height x Gravitational Field Strength = ½ (Mass x Speed^2)
- Power = Work Done / Time
Forces & Motion:
- Force = Mass x Acceleration
- Force = (Mass x Final Velocity) - (Mass x Initial Velocity) / Time
- Force = Change in Momentum / Time
- Momentum before Collision = Momentum after Collision
- Momentum = Mass x Velocity
- Moment of a Force = Force x Perpendicular Distance from the Pivot
- Final Speed^2 = Initial Speed^2 + 2 x Acceleration x Displacement
- Acceleration = Final Velocity - Initial Velocity / Time
Electricity:
- Power = Voltage x Current
- Energy = Current x Voltage x Time
- Charge = Current x Time
- Energy Transferred = Charge x Voltage
- Potential Difference = Energy / Charge
Dynamics:
- Force = Spring Constant x Extension
- Reaction Time = Time taken to react to a hazard
- Thinking Distance = Distance travelled during the reaction time
- Braking Distance = Distance travelled when braking
- Stopping Distance = Braking Distance + Thinking Distance
Waves:
- Wave Speed = Frequency x Wavelength
- Frequency = 1 / Time Period
2
, - Refractive Index n = Sin i / Sin r
- Refractive Index n = Speed of Light in a Vacuum / Speed of Light in a Material
- Speed of Light in a Vacuum = 300,000,000 m/s
- Critical Angle = Sin^-1 (1 / Refractive Index)
- Speed of Sound = Distance between 2 Mics / Time from Mic 1 to Mic 2
Magnetism & Electromagnetism:
- Primary Coil Voltage (Vp) / Secondary Coil Voltage (Vs) = Number of Primary Turns
(Np) / Number of Secondary Turns (Na)
- Primary Coil Voltage x Primary Coil Current = Secondary Coil Voltage x Secondary
Coil Current
- Voltage = Current x Resistance
- Power = Current x Voltage
Solids, Liquids & Gases:
- Density = Mass / Volume
- Pressure = Force / Area
- Pressure Difference = Height x Density x Gravitational Field Strength
- Change in Thermal Energy = Mass x Specific Heat Capacity x Change in
Temperature
- Pressure = Constant x Temperature in Kelvin
- Initial Pressure / Initial Temperature = Final Pressure / Final Temperature
- Pressure x Volume = Constant
- Initial Pressure x Initial Volume = Constant = Final Pressure x Final Volume
Astrophysics:
- Orbital Speed = (2 x π x Orbital Radius) / Time Period
- Weight = Mass x Gravitational Field Strength
- Change in Wavelength / Reference Wavelength = Velocity of a Galaxy / Speed of
Light
- (λ - λ0) / λ0 = Δλ / λ0 = v/c
3
