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Is large brake on a bicycle wheel more e...

Is large brake on a bicycle wheel more effective than a small one ? Explain

A

the force of friction is independent of the area of contact

B

the force of friction is directly proportional to the area of contact.

C

the force of friction is dependent on the frame of reference.

D

the force of friction is independent on the frame of reference.

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The correct Answer is:
A
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