Paper 1 Equations

• Equation for finding Kinetic Energy

  kinetic energy = 0.5 × mass × (speed/velocity)^2
• Equation for finding Gravitational Potential Energy

  gravitational potential energy = mass × gravitational field strength × height
• Equation for finding elastic potential energy

  elastic potential energy = 0.5 × spring constant × (extension)^2
• Equation linking energy transferred to Specific Heat Capacity

  change in thermal energy = mass × specific heat capacity × temperature change
• Equation linking power and energy transferred

  Power = Energy transferred/time
• Equation linking power and work done


  power = work done/time
• Equation linking Efficiency and energy transfer


  efficiency = useful output energy transfer / total input energy transfer
• Equation linking efficiency and power


  efficiency = useful power output / total power input
• Charge Flow


  charge flow = current × time
• Formula linking Potential difference and current


  potential difference = current × resistance
• How is power linked to current and potential difference


  power = potential difference × current
• Link between power and currentand resistance 


  power = (current)^2 × resistance
• Rearrange equation of power where energy transferred is the subject


  energy transferred = power × time
• Equation for energy transferred per passed charge


  energy transferred = charge flow × potential difference
• Energy needed to change state


  thermal energy for a change of state = mass × specific latent heat
• Equation of Weight


  weight = mass × gravitational field strength
• Work done equation


  work done = force × distance (along the line of action of the force)
• Rearrange spring constant equation to where force is the subject


  force = spring constant × extension
• Equation for Pressure


  pressure = force normal to a surface / area of that surface
• Equation for distance travelled

  distance travelled = speed × time
• Acceleration equation

  acceleration = change in velocity / time taken
• Resultant force of an accelerating object


  resultant force = mass × acceleration
• Magnification (physics)


  magnification = image height/object height
• Equation that links charge flow, energy transferred and potential difference

  Energy Transferred = Charge Flow × Potential Difference