Question

name any three objects having rough surface​

Answer 1

Answer:

(1) Soles of shoes

(2) Surface of ply board

(3) Surface of a brick

(4) Surfaces of tyres.

Answer 2

Three objects which have a rough surface are: our palm, the soul of our shoe, the tyre of a wheel.

Explanation:  

• The souls of the shoes and tyres are built in such a way that their coefficient of friction is high. This is ‘done’ to ‘increase the friction’ between the shoe and the floor.  

• The chance of ‘slipping would be high’. And the car would ‘move for a longer distance’ after the ‘brakes are applied’.

• Hence the coefficient of friction is higher for this ‘two types of substances’.

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