Questions:

1. A feather is dropped in a vacuum and special equipment takes measurements as to the distance at each second. How far has the feather fallen in 4 seconds?
   
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2. You know that the feather, still in the vacuum, has fallen 6 feet. How long did it take for the feather to travel this distance? The application will not calculate exactly at 6 ft., so trying running and pausing it when it gets to the 6-ft. mark.
   
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3. Two objects are dropped in a vacuum at the same time, a feather and a brick. Which will land first? Explain your answer.
   
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4. The illustration in the interactive application is an example of what type of variation? Explain your answer.
   
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