GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TRUE
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FALSE
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Either A or B
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None of the above
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Detailed explanation-1: -The force of friction depends on the area of contact between the two surfaces. As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction.
Detailed explanation-2: -It is absolutely TRUE. Rolling friction is bigger than sliding friction. So in many machines sliding is replaced by rolling.
Detailed explanation-3: -In rolling friction, the surface contact is less which results in less friction. Rolling friction is less than the sliding friction.
Detailed explanation-4: -Sliding friction can be changed into rolling friction easily by providing wheels or ball bearings to the objects to reduce friction and facilitate easy movement.
Detailed explanation-5: -The sliding friction is slightly smaller than the static friction, hence the given statement is false.