Question

Which of the following is not an example of air exerting pressure ?

A

Pressing the brakes of a bicycle.

B

Filling up the bicycle tube with air

C

Riding bicycle against the flow of wind

D

Playing with the kite

Easy

Solution

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Correct option is
A

Pressing the brakes of a bicycle.

Brakes on a bicycle work using friction (the rubbing force between two things that slide past one another while they're touching). Hence brakes doesn't work on the principle of air exerting pressure.

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