A pendulum has 295 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing?

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01-01-2018
Physics

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A pendulum has 295 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing?

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Louli Louli · Answer 1 · 2018-01-01T08:45:01+01:00

The law of conservation of energy states that: "For an isolated system, the total amount of energy is conserved."

For the given system:
Total energy = potential energy + kinetic energy
At the highest point of the swing:
kinetic energy is zero and potential energy is maximum
Total energy = 295 + 0 = 295 J

At the lowest point of the swing:
kinetic energy is maximum and potential energy is zero. Total energy is the same, therefore:
295 = 0 + kinetic energy
kinetic energy = 295 J