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Helpful Equations

1. Kinetic Energy = 0.5 x Mass x Velocity^2

  • Kinetic energy - J

  • Mass - Kg

  • Velocity - m/s

2. Elastic Potential Energy = 0.5 x Spring constant x Extension^2

  • Elastic Potential Energy - J

  • Spring Constant - N/m

  • Extension - m

3. Gravitational Potential Energy = Mass x Gravity x Height 

  • Gravitational Potential Energy - J

  • Mass - Kg 

  • Gravity - N/Kg

  • Height - m

4. Change in Thermal Energy = Mass x Specific Heat Capacity x Change in Temperature 

  • Change in Thermal Energy - J

  • Mass - Kg

  • Specific Heat capacity - J/Kg C

  • Change in Temperature - C

5. Power = Energy Transferred / Time 

  • Power - W

  • Energy Transferred - J

  • Time - S

6. Power = Work Done / Time 

  • Power - W

  • Work Done - J

  • Time - S

7. Efficiency = Useful Energy Out / Total Energy in 

8. Efficiency = Useful Power out / Total Power in 

9. Force = mass x acceleration 

  • Force - N

  • Mass - Kg

  • Acceleration - m/s

10. Electrical Power = Current x Potential Difference

  • Electrical Power = C

  • Current = A

  • Potential Difference = V