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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Solution

(b) rolling friction is less than sliding friction

Rolling friction is less than sliding friction because of the minimal surface of contact between two bodies.

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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.

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.

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

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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.

(b) rolling friction is less than sliding frictionRolling friction is less than sliding friction because of the minimal surface of contact between two bodies.

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.

(b) rolling friction is less than sliding friction

Rolling friction is less than sliding friction because of the minimal surface of contact between two bodies.