Question

if the surface of object is smooth and the surface the object is working is rough then the friction will be less or more ??​

Answer 1

Answer:

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

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Answer 2

Answer:

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

There is more friction between two coarse materials rubbing against each other than between a coarse and a smooth surface. Equally, there is relatively little friction exerted between two smooth surfaces. Sometimes, the frictional force is so great that it prevents movement.

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