Physics equations

• Kinetic energy

  0.5 x mass x (speed)^2
• Elastic potential energy

  0.5x spring constant * (extension)^2
• Gravitational potential energy

  mass gravitational field strength x height
• Change in thermal energy

  mass specific heat capacity temperature change
• Power

  energy transferred / time
• Work done

  power x time
• Efficiency

  useful output energy transfer / total input energy transfer
• Efficiency

  useful power output / total power input
• Charge flow

  current x time
• Potential difference

  current x resistance
• Power

  potential difference * current
• Power

  current x resistance
• Energy transferred

  power x time
• Energy transferred

  charge flow x potential difference
• Density

  mass / volume
• Thermal energy for a change of state

  mass x specific latent heat
• For gases

  pressure x volume = constant
• Weight

  mass x gravitational field strength
• Work done

  force x distance (along the line of action of the force)
• Force

  spring constant x extension