P2 3.2/3.3

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Key points and Learning objectives:

What does the gravitional potential energy of an object depend on?

  • The gravitional potential energy of an object depends on its weight and how far it moves vertically(its change of height).

Gravitational potential energy is energy stored in an object because of its position in the Earth's gravitational field.

What happens to the gravitional potential energy of an object when it moves up or down?

  • When an object is moved up its gravitational potential energy increases and the increase of its gravitational potential energy is equal to the work done on it by the lifting force.
  • When an object moves down its gravitational potential energy decreases. The decrease of its gravitational potential energy is equal to the work done by the force of

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