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Frictional force

Question 13Im...

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Question 13
Imagine that an object is falling through a long straight glass tube held vertical; air has been removed completely from the tube. The object does not touch the walls of the tube. Will the object experience any force of friction?

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Solution

No, the object will not face any friction.
Due to the absence of air, there is nothing to provide friction.
Friction arises when molecules of air provide resistance. The absence of any medium removes friction.

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Frictional force

Standard VI Physics

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