Physics Formulae

Physics Formulae

1. Forces and Motion

   • Force=mass x acceleration
   • Acceleration=change in velocity / time
   • Momentum= mass x velocity
   • Density = mass / volume
   • Speed= distance / time
   • Weight= mass x gravitational field strength
   • Moment= force x perpendicular distance from pivot

2. Energy resources

   • Efficiency= useful energy output / total energy input x100%
   • Work Done= force x disstance
   • energy transferred=work done
   • Kinetic Energy = ½ x mass x speed²
   • GPE= mass x gravitational field strength x change in height
   • Power=work done / time taken

3. Solids, Liquids and Gases

   • Weight=mass x gravitational field strength
   • Pressure= force / area
   • Density= mass / volume
   • Pressure Difference= height x density x gravitational field strength

4. Electricity

   • Charge= current x time
   • Voltage= current x resistance
   • Electrical Power= voltage x current
   • Input Power = Output Power
   • Energy= power x time
   • Current in Amps= change in coulombs / time in seconds

5. Waves

   • Wave speed=frequency x wavelength
   • Refractive Index(n)= sin i / sin r
   • Refractive Index(n)= 1 / sin C