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Q.

The relationship between rolling and sliding friction is that:

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a

rolling friction is more than sliding friction

b

rolling friction is less than sliding friction

c

rolling friction is the same as sliding friction

d

It is easier to apply grease to ball bearings to reduce friction 

answer is B.

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Detailed Solution

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  • The relationship between rolling and sliding friction is that rolling friction is less than sliding friction.
  • Ball bearings are used in many machines because rolling friction acts in ball bearings. 
  • The magnitude of rolling friction is less than the sliding friction. Hence rolling friction is preferred as it increases the efficiency of the machine.
     
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