Is it true that sliding friction is the weakest among others?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
Rolling friction comes into play when an object rolls over the other surface, and the points of contact have less space and time to interlock; hence, friction is the least. Sliding friction comes into play when one object slides over the other and must be kept moving at the same speed. Thus, the contact points do not have time to interlock; thus, the friction is more than rolling friction but less than static friction. The force required to overcome friction when moving a body is the largest because the contact points are tightly interlocked. Thus, Rolling friction is the weakest kind of friction. It is the force that resists the motion of an object rolling across a surface; this is why wheels are used for most types of ground transportation, including bicycles, cars, and skates.
The correct statement would be, rolling friction is the weakest among others.

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