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A long way down…

A long way down…. How would you describe a bungee jumper? As someone who is:. brave. insane. full of gravitational potential energy (GPE). GPE is the amount of energy an object has because of its position above the ground, i.e. its height. What is gravitational potential energy?.

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A long way down…

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  1. A long way down… How would you describe a bungee jumper? As someone who is: • brave • insane • full of gravitational potential energy (GPE). GPE is the amount of energy an object has because of its position above the ground, i.e. its height.

  2. What is gravitational potential energy? The gravitational potential energy (GPE) of an object on Earth depends on its mass and its height above the Earth’s surface. • When a bungee jumper starts to fall, he starts to lose GPE. • As the elastic cord pulls the bungee jumper back up, he gains GPE.

  3. GPE = mass x gravitational field strength x height How is GPE calculated? The GPE of an object can be calculated using this equation: • Mass is measured in kilograms (kg). • Gravitational field strength is measured in newtons per kilogram (N/kg), usually taken as 10N/kg on Earth. • Height is measured in meters (m). • GPE is measured in joules (j).

  4. Factors affecting GPE

  5. Calculating GPE question 1 An eagle with a mass of2kg flies at a height of200m above the ground. How much gravitational potential energy does the eagle have? GPE = mass x gravitational field strength x height = 2 x 10 x 200 = 4,000J

  6. changein height GPElost = mass x gravitational field strength x Calculating GPE question 2 An apple with a mass of 200g falls 3m from its branch to the ground. How much GPE will the apple have lost when it reaches the ground? = 0.2 x 10 x 3 = 6J

  7. GPE, mass and height calculations

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