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because there is grease between them......

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12y ago
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Q: Why do wheels need ball bearings to reduce friction?
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Related questions

What friction is the type of friction produced by wheels or ball bearings?

the friction produced by objects such as wheels or ball bearings is called rolling friction


What kind of friction can help reduce friction?

I never heard of friction reducing friction. You can reduce friction by using lubricants, as well as using wheels (as in ball bearings).


Why are ball bearing used in wheels?

Machine parts use ball bearings to reduce friction, making it easier to move the moving parts and producing less wear on the parts.


Why do you use ball bearings?

Because they're a good way to reduce friction and help wheels and axles to spin smoothly and effortlessly.


What is a type of friction that is reduced by wheels and ball bearings?

Jimmy Mc Oi


What is friction reduction?

It means what how can the friction be reduced. To answer this question, Friction can be reduced by devices like ball bearings, wheels and lubricants.


What are two means by which friction may be reduced?

Lubrication and ball bearings both reduce friction.


Three examples of where ball bearings are used to reduce friction?

in machineare parts


How do ball bearings reduce friction in machinery?

Ball bearings reduce friction in machinery by presenting a minimal surface area. This is because only very small areas of each ball are in contact with the surface. Therefore,the ball bearing is indeed a very useful thing for machinery to work.


What are two ways you can reduce friction in a machine?

A lubricant such as oil and ball bearings are just (2) methods of reducing friction.


What is ball bearings?

it is a mechanical equipment to reduce friction. It is used in moving parts very often.


How is friction small in the bottom bracket of a bike?

The bottom bracket where 3 frame arms meet is supplied with ball or roller bearings which are able to reduce friction very substantially. There are ball or roller bearings also in the gear changing mechanism, in the top and bottom of the "headstock", the front tube into which the handlebar fits, in the pedals, and in the hubs of both wheels.