Equations

• kinetic energy, speed, mass

  kinetic energy = 1/2 × mass × speed^2
• gravitational potential energy, height, mass, gravitational field strength

  gravitational potential energy = mass × gravitational field strength × height
• power, work done, time

  power= work done / time taken
• efficiency

  efficiency = useful energy output / total energy input
• charge, time, current

  charge = current × time
• resistance, current, potential difference

  potential difference = current × resistance
• power, potential difference, current

  power = current × potential difference
• resistance, power, current

  power = (current)^2 × resistance
• energy, time, power

  energy = power × time
• energy, charge, potential difference

  energy = charge × potential difference
• mass, density, volume


  density = mass / volume