If the static friction between two surfaces P and Q is measured to be 50 N, then the sliding friction between these two surfaces is most likely to be :

Which of the following statements is incorrect ?

If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be :

Which of the following will produce the maximum friction?

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 distances of 5 m, 5.5 m, 4.8 m and 5.2 m respectively. The friction between the brake pads and discs will be the maximum in the car which travels the distance of: