Mini-Quiz: Gravitational Force Between Two Objects

1. Why is an average separation between the Earth and the Moon used?

   It is difficult to measure the exact separation since the Moon is moving so fastSorry, not correct. Try another button. The Moon's orbit around the Earth is more of an ellipse, so an average must be usedCorrect. You know about gravitational forces. Measuring devices are not accurateGood try, but not right. Select another answer.

2. What is one result of the great force between the Earth and the Moon?

   Oceans are pulled toward the MoonThat is Correct. You sure are smart! There is no gravitation on the MoonOops! Wrong answer. Re-read the question and try again. Items often will just fly into spaceSorry, not correct. Try another button.

3. Why won't most objects move together because of their gravitational forces?

   They actually repel each otherOops! Wrong answer. Re-read the question and try again. No one is sure of the reasonGood try, but not right. Select another answer. The force of attraction is quite smallCorrect. You know about gravitational forces.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.