Since rolling friction is less than sliding friction, sliding friction is replaced with rolling friction in most machines using ball bearings.

Less

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False

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Solution

The correct option is A Less
The given statement is true. Ball bearings are used in many machines to utilize rolling friction instead of sliding friction between moving parts. Rolling friction is preferred as it is less in magnitude than sliding friction and hence improves efficiency of the machine.

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Since rolling friction is less than sliding friction, sliding friction is replaced with rolling friction in most machines using ball bearings.

Most machines use ball bearings to reduce the energy lost in friction since rolling friction is smaller than sliding friction.

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