Mini-Quiz: Escape Velocity from Gravity

1. Why is it sometimes called surface escape velocity?

   Because it is the attained velocity at or near the surfaceThat is correct. You understand escape velocity. To avoid confusion with underwater escape velocitySorry, not correct. Try another button. No one is sure where the expression came fromGood try, but not right. Select another answer.

2. Why is the escape velocity of the Moon so much less than the Earth's?

   Because the Moon is so far from the EarthSorry, not correct. Try another button. Because the gravity and radius of the Moon are much less than the Earth'sCorrect. You must have studied the material. The escape velocity from the Moon is actually higher than from EarthOops! Wrong answer. Re-read the question and try again.

3. What might happen if a rocket blasted off at the gravity escape velocity from the Earth?

   The rocket exterior might burn up before it left the atmosphereThat is correct. You understand escape velocity. The rocket would only make it to the MoonGood try, but not right. Select another answer. The rocket would go into space and never come backOops! Wrong answer. Re-read the question and try again.

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