Is it true that frictional forces are of only two types?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
Friction is the force that opposes the relative motion between two surfaces of objects when they come in contact. The frictional force is the force which resists sliding or rolling one solid object over the other. The frictional force will always slow down a moving body.
There are different types of friction. However, it can be classified mainly into four types; static friction, sliding friction, rolling friction, and fluid friction. When two bodies are in contact, the friction and the normal force are directly proportional to the contacting surfaces. And it does not depend on the hardness of the contacting surface.
The correct statement would be that frictional forces are not only two types.

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