Acceleration problem

  • #1
TickleMeElma
16
0
A motion picture is made of a stone falling down. It shows that the acceleration is downward. Now run the film backwards. It will show the stone accelerating upwards.

True or false?

I am not sure on this one...I think it is false, because if traced backwards, the stone is actually slowing down as it is reaching the top from which it was initially thrown. :confused:

Thanks so much everyone!
 

Answers and Replies

  • #2
Doc Al
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You are correct. What the backwards film will show is a rising stone, but the acceleration will still be downwards since it slows down as it rises.
 
  • #3
NewScientist
171
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If you run the film backwards, time is running backwards an dso any observations are null.
 
  • #4
Doc Al
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You're just running the movie backwards, not the universe! :smile:
 
  • #5
TickleMeElma
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Thanks so much!
 
  • #6
NewScientist
171
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Doc Al said:
You're just running the movie backwards, not the universe! :smile:

Ah i interpreted traced as something else!
 

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