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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Similar questions

Ball bearing is a device which usually converts:
(a) rolling friction into sliding friction
(b) static friction into sliding friction
(c) sliding friction into rolling friction
(d) rolling friction into static friction

Which of the following statements is incorrect?
(a) static friction is greater than rolling friction
(b) sliding friction is less than rolling friction
(c) rolling friction is less than static friction
(d) static friction is greater than sliding friction

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.

Q. Ball bearings are useful because
(a) rolling friction is more than sliding friction.
(b) rolling friction is less than siliding friction.
(c) rolling friction is same as sliding friction.
(d) it is easier to apply grease to ball bearings to reduce friction.

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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.

The correct option is A LessThe 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.