Q. Four similar cars having exactly the same mass are running at the same speed on the same road when brakes are applied at the same time. The cars come to a stop after covering distance of 5m,5.5m ,4.8m and 5.2m respectively. The friction between the brake pads and discs will be the maximum in the car which travels the distance of:
A) 5m B) 5.5m C) 4.8m D) 5.2m

Pls give the explanation

Dear student,
Answer is option C. 
Friction is the opposition force between surfaces that are in contact and are in motion with respect to one another. It slows down or stops the moving objects. The friction between the brake pads and discs will be the maximum in the car which stops after covering the least distance. So, the car that stops after covering 4.8 m have maximum friction between its brake pads and discs.
Regards.

 

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C) 4.8m as with increase in mass, friction also increases
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