physics formulas - paper 1

• work done

  force x distance
• GPE (gravitational potential energy)


  mass x gravitational field strength x height

  m x g x h
• KE - kinetic energy


  0.5 x mass x velocity(SQUARED)

  0.5 x m x v2
• Ee - elastic potential energy 


  0.5 x spring constant x extension (SQUARED)

  0.5 x k x e2
• link an equation with power, energy and time

  energy = power x time

  E = p x t
• efficiency

  efficiency = useful energy output/total energy input

  ( x by 100 only to find out percentage)
• specific heat capacity 


  energy = mass x SHC x temp change

  E = m x c x (triangle0)
• an equation that links current, change and time

  current (I) = charge (Q) / time (t)

  I = Q / t
• an equation that links potential difference, energy and change

  pd (V) = Energy (E) / Charge (Q)

  pd = E / Q
• an equation that links resistance, current and voltage

  voltage = current x resistance

  V = I x R
• an equation that links power, voltage and current

  power = voltage x current

  P = V x I
• an equation that links power, resistance and current

  power = current(squared) x resistance

  p = I2 x R
• an equation that links power, resistance and voltage

  power = voltage(squared) / resistance

  p = V2 / R
• specific latent heat

  specific latent heat (L) = Energy / mass

  L = E / m
• an equation that links pressure, force and area

  pressure = force / area

  P = f / a