Question

Identify in the given below situations whether friction/fluid friction is increasing or decreasing when: (a) Sole of shoes are grooved (b)Few drops of oil are poured on the hinges of the door.​

Answer 1

Answer:

A.Soles of shoes are grooved because the grooves increases the friction and gives the good grip to the person while walking with shoes.

B.As the oil act as a lubricant to reduce the friction for the hinges to move easily drops of oil are poured o the hinges of a door.

Explanation:

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Answer 2

(a) The friction will increase.

(b) The friction will decrease because oil acts as a lubricant which reduce friction.

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