Air resistance on bodies in free fall

  • #1
125
1

Main Question or Discussion Point

Hi,

In a demonstration that was shown in class, two paper cups were dropped from different heights. The first was dropped from two meters and the other was dropped from one meter. Both landed on the ground at the same time.

Why is this so? Would it be reasonable to say that if I dropped one minibus from one thousand meters and the other from five hundred meters, both would hit the ground at the same time?

Thanks,
 

Answers and Replies

  • #2
NascentOxygen
Staff Emeritus
Science Advisor
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In a demonstration that was shown in class, two paper cups were dropped from different heights. The first was dropped from two meters and the other was dropped from one meter. Both landed on the ground at the same time.
If they were released simultaneously, and the only difference was their release height, then for what you say to be true the one released at 2m must have been forcibly thrown downwards.
Why is this so? Would it be reasonable to say that if I dropped one minibus from one thousand meters and the other from five hundred meters, both would hit the ground at the same time?
For identical minibuses—only if there was some sort of a 'chute attached to the lower one. :smile:
 
  • #3
210
0
If you teacher did the demonstration are you sure the demo was not rigged?
Perhaps ther was a lump of iron in th e higher cup?
 

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