Gravitational Potential Energy

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Gravitational Potential Energy
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Gravitational Potential Energy

• Gravitational potential energy (PE) is gained
  when a mass (m) is moved vertically upwards some
  distance (h) in a gravitational field (g).
• PE m x g x h
• PE Energy Joule (J)
• m mass kilogramme (kg)
• g grav field Newton/kilogramme (N/kg)
• h height metre (m) .

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Example (1)

• A mass of 50 kg is lifted up a vertical distance
  of 40 m. What is the gravitational potential
  energy gained ? g 10 N/kg
• PE m x g x h
• PE 50 x 10 x 40
• PE 20,000 J
  .

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Example (2)

• A mass of 800 g is raised a total vertical
  height of 50 cm. Calculate the potential energy
  gained.
• PE m x g x h
• PE 0.8 x 10 x 0.5
• PE 4 J
  .