Yesterday, I did a lab with Taryn where we managed a 4.7 million dollar budget to a few objects up a 45 degree tilted upward string. First, we had a paper towel tube on the string and blew up a balloon. We taped the balloon with the hole facing backwards, let go of the hole, and as the air flew out, our tube went half way up the string. On our second attempt, we had the same set up-but this time we blew up the balloon more. For this, our tube went all the way to the top.
Next, since the first launch was completed, we attached the battery to the tube to add more weight. As we let go of the opening to the balloon, the tube went 3/4 of the way of the string. After that, we ran out of time.
TRIALS:
1st trial: fail (only went half way up w/o any extra weight attached) -20,000 (for wasted fuel)
2nd trial: success (all the way to the top w/o any extra weight attached.)
3rd trial: fail (3/4 of the way up w/ a battery attached) -20,000 (for wasted fuel)
NEWTON'S 3rd LAW:
This lab relates to Newton's 3rd law- for every action there is an equal and opposite reaction, because as the as the air was pushed out of the balloon, the opposite reaction would be for the balloon to move at the same force up the string as the air pushed out of it (which it did). The only thing (besides technical difficulties, i.e. tape not strong enough) that could go wrong with this lab is if the air coming out of the balloon was not fast enough with enough force to have the balloon move as fast as the air up the string, before it slides down.
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1 comment:
Excellent blog post! Very complete and detailed.
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