True or false?
The friction can be increased or decreased as desired.

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True

False

answer is A.

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Detailed Solution

The friction can be increased or decreased as desired by controlling the factors affecting the friction. For example, mass and the nature of the surfaces in contact. Friction is directly proportional to the mass of the object in contact with a surface. The more mass, the more friction, and vice versa. Therefore, we change the mass to increase or decrease the friction. We can also change the nature of the object, either making it smooth or rough in order to decrease or increase friction.

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