Ball bearings are used in machines as friction which is than sliding friction.

fluid

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rolling

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static

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less

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Solution

The correct option is D less
Ball bearings are spherical bearings loosely held in a track or groove. They are used in most of the machines as rolling friction is less than sliding friction.

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Similar questions

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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