Newton's Law of Gravity Video Lessons

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Problem: In recent years, astronomers have found planets orbiting nearby stars that are quite different from planets in our solar system. Kepler-12b, has a diameter that is 1.7 times that of Jupiter (RJupiter = 6.99 × 107 m), but a mass that is only 0.43 that of Jupiter (MJupiter = 1.90 × 1027 kg ).What is the value of g on this large, but low-density, world?

FREE Expert Solution

From Newton's second law:

F=mg

Gravitational force is:

F=GMmR2

Equating:

GmMR2=mgg=GMR2

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Problem Details

In recent years, astronomers have found planets orbiting nearby stars that are quite different from planets in our solar system. Kepler-12b, has a diameter that is 1.7 times that of Jupiter (RJupiter = 6.99 × 107 m), but a mass that is only 0.43 that of Jupiter (MJupiter = 1.90 × 1027 kg ).

What is the value of g on this large, but low-density, world?

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