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These are some of the key equations you may need for the GCSE physics curriculum P2 exam, sometimes they are given to you but sometimes they expect you to use your own knowledge but using the numbers given. For example the question may be:

**write the equation linking mass, acceleration and force**.- Acceleration = Change in velocity
**(m/s)**÷ Time taken for change**(seconds)** - Slope of the line
**(speed in a distance-time graph and acceleration in a velocity-time graph)**= height of triangle ÷ base of triangle - Resultant Force
**(N)**= Mass**(kg)**x Acceleration**(m/s2)** - Stopping Distance
**(m)**= Thinking distance**(m)**+ Braking distance**(m)** - Weight
**(N)**= Mass**(kg)**x Gravitational field strength**(N/kg)** - Kinetic Energy
**(J)**= 1/2 x Mass**(kg)**x Speed x Speed**(m/s)** - Work Done
**(J)**= Force**(N)**x Distance moved in the direction of the force**(m)** - Gravitational Potential Energy
**(J)**= Weight**(N)**x Change in height**(m)** - Momentum (
**kg m/s)**= Mass**(kg)**x Velocity**(m/s2)** - Mass A
**(kg)**x Velocity A**(m/s2)**= Mass B**(kg)**x Velocity B**(m/s2)** - Force
**(N)**= Change of momentum (kg m/s) ÷ Time taken for change**(s)** - Resistance
**(Ω)**= Potential Difference**(V)**÷ Current**(A)** - Frequency
**(Hz)**= 1 ÷ Time**(s)** - Power
**(W)**= Energy Transferred**(J)**÷ Time**(s)** - Energy Transferred
**(J)**= Charge Flow**(coulombs per sec)**x Energy Transfer**(per unit)** - Charge Flow
**(Coulombs)**= Current**(A)**x Time**(s)** - Energy Transferred
**(J)**= Potential Difference**(V)**x Charge Flow**(coulombs)**

End of this topic!

Drafted by Gina (Physics)