Question

If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be :
A. 25 N
B. 20 N
C. 5 N
D. 50 N

Answer 1

Answer:

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YOUR ANS...

5 N

AS ROLLING FRICTION IS LESS THAN STATIC FRICTION...

Answer 2

C. 5 N

Explanation:

Friction is a phenomenon which resists motion when an object is rubbed against another. Static friction is between two objects that are not moving. Sliding friction is between two objects when one or both are sliding against each other. Sliding friction is lesser than static friction. Rolling friction is between two objects where one or both of the surface is circular. Rolling friction is less than sliding friction.

So rolling friction should be much smaller than the static friction of 20N.

Option C is the answer.