Which of the following is not used to change sliding friction into a much smaller type of rolling friction?

Wheels

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Roller bearings

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Lubricants

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All of the above

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Solution

The correct option is C
Lubricants

Lubricants are simply used to reduce friction by smoothening the surfaces.

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Similar questions

Q. Assertion :In order to reduce sliding friction, lubricants are used. Reason: Lubrication changes the conditions of rubbing, replacing the sliding friction by rolling friction, there by reducing the force of friction.

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

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

Q. Ball bearings use rolling friction instead of sliding friction.

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

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Which of the following is not used to change sliding friction into a much smaller type of rolling friction?

The correct option is C Lubricants Lubricants are simply used to reduce friction by smoothening the surfaces.

The correct option is C
Lubricants

Lubricants are simply used to reduce friction by smoothening the surfaces.