Physics Equations

Physics Equations

1. SECTION 1; Force and Motion

   • Speed = distance moved / time taken
     • s = d ÷ t
   • Acceleration = change in velocity / time taken
     • a = (v-u) ÷ t
   • Force = mass X acceleration
     • F = m x a
   • Weight = mass X gravitaional field strength
     • W = m x g

2. SECTION 2; Electricity

   • Power = Current X Voltage
     • P = I x V
   • Voltage = current X resistance
     • V = I x R
   • Charge = current X time
     • Q = I x t
   • Energy transferred = Charge X voltage
     • E = Q x v

3. SECTION 3; Waves

   • Wave speed = frequency X wavelength
     • v = f x λ
   • Refractive index = n
     • n= sin i / sin r
     • sin c = 1 / n

4. SECTION 4; Energy transfer and resources

   • Efficiency= (useful energy output÷Total energy input) X 100
   • Work done = Force X Distance Moves
     • W=Fxd
   • Gravitational potential energy = Mass X g X Height
     • GPE = m x g x h
   • Kinetic Energy = 1/2 x Mass x speed2
     • KE = 1/2 x m x v2

5. SECTION 5; Solids, Liquids and gases

   • Density = mass ÷ Volume
     • p = m÷V
   • Pressure = force ÷ area
     • p = F÷A
   • Pressure difference = hight X density x g
     • p = h x p x g