Mini-Quiz: Equivalence Principle of Gravity

1. What happens when you increase the mass of an object?

   The force of gravity on it increasesCorrect. You are doing great. The acceleration due to gravity increasesSorry, not correct. Try another button. Its weight decreasesGood try, but not right. Select another answer.

2. When does the rule that different masses fall at the same rate fail?

   The rule is always true, no matter whatSorry, not correct. Try another button. It fails every other time you try itOops! Wrong answer. Re-read the question and try again. When an object is noticeably affected by air resistanceThat is Correct. You seem to understand about gravity.

3. How could Galileo tell whether the balls hit the ground at the same time, after he dropped them from the Leaning Tower of Pisa?

   He used a stopwatch to time themGood try, but not right. Select another answer. He had someone standing on the ground below to make the observationCorrect. You are doing great. He just guessed that they probably hit the ground at the same timeOops! Wrong answer. Re-read the question and try again.

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