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Earth/Moon gravitational field HTML5

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Summary

Gravitational fields (and force!) obey the principle of superposition. You can show that the field follows a spherical symmetry near the planets but the influence of the Earth extends farther because of its superior mass (80 times Moon's mass).
Notice the existence of a single point where the g field is equal to zero.
Click on the screen to show or erase the field lines.
This animation is not done to scale.

Learning goals

  • To apply the superposition principle to determine the gravitational field at any point between the Earth and the Moon.
  • To show how much stronger the earth's field is compared to that of the Moon..

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