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Merits and Demerits of Friction

Ravi is clean...

Question

Ravi is cleaning a blackboard with a duster. The main cause of friction between the board and the duster is .

roughness

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plowing effect

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adhesion

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Solution

The correct option is A roughness
Since the surfaces of the blackboard and the duster are rough, the cause of friction is roughness.

Suggest Corrections

Similar questions

Statements:

Some bolts are not cups.

All dusters are balls.

All bolts are balls.

Conclusions:

I.All cups are bolts.

II.Some dusters are bolts is a possibility.

Which among the following is not a 3D object?

5 x 5 x 7

5

10

2.14

0.5 k g

11 N

0.5

10 c m

0.55 J

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