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A person has applied some mustard oil on his hands. Which of the following objects will become most difficult for him to hold in his hand?
Mustard oil reduces the friction on his hands. So, Glass tumbler will be most difficult to handle.
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: