Helpful Equations

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

• Kinetic energy - J

• Mass - Kg

• Velocity - m/s

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

• Elastic Potential Energy - J

• Spring Constant - N/m

• Extension - m

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3. Gravitational Potential Energy = Mass x Gravity x Height 

• Gravitational Potential Energy - J

• Mass - Kg 

• Gravity - N/Kg

• Height - m

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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

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5. Power = Energy Transferred / Time 

• Power - W

• Energy Transferred - J

• Time - S

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6. Power = Work Done / Time 

• Power - W

• Work Done - J

• Time - S

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7. Efficiency = Useful Energy Out / Total Energy in 

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8. Efficiency = Useful Power out / Total Power in 

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9. Force = mass x acceleration 

• Force - N

• Mass - Kg

• Acceleration - m/s

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10. Electrical Power = Current x Potential Difference

• Electrical Power = C

• Current = A

• Potential Difference = V

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