GCSE Physics Equations

GCSE Physics Equations

1. Forces/motion

   • F=ke
     • Force = spring constant x extension
   • s=vt
     • Distance = speed x time
   • a=∆v/t
     • Acceleration = change in velocity / time
   • F=am
     • Force = acceleration x mass
   • M=mv
     • Momentum = mass x velocity
   • M=Fd
     • Moment of a force = force x perpendicular distance from the turning point

2. Energy

   • W=mgh
     • Weight = mass x gravity x height
   • Ek=1/2 mv^2
     • Kinetic energy = half of the mass times the velocity squared
   • Ee=1/2 ke^2
     • Elastic potential energy = half times the spring constant times the extension squared
   • ∆E=mc∆θ
     • Change in energy = mass x specific heat capacity x change in temperature
   • P=E/t
     • Power = energy/time
   • P=W/t
     • Power = work done / time
   • Efficiency=useful energy output / total energy input
   • Efficiency = useful power output / total energy input
   • E=mL
     • Energy = mass x specific latent heat
   • W=Fs
     • Work done = force x distance

3. Electricity

   • Q=It
     • Charge = current x time
   • V=IR
     • Voltage = current x resistance
   • P=IV
     • Power = current x voltage
   • P=(I^2)R
     • Power = current squared x resistance
   • E=QV
     • energy = charge x potential difference

4. Waves

   • period = 1/frequency
   • v=fλ
     • Wave speed = frequency x wavelength

5. Particles

   • ρ=m/v
     • Density = mass/volume

6. Magnetism

   • F=BIl
     • Force acting on a wire = magnetic flux density x current x length of the wire