Advertisements
Advertisements
प्रश्न
Why is a ball bearing used in a cycle hub?
Advertisements
उत्तर
The rolling friction is smaller than sliding friction, sliding is replaced by rolling with the usage of ball bearings. So lead shots are used in the bearing of a cycle hub.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative.
Friction is reduced by
State two factors which directly affect the force of friction.
List three ways of reducing friction.
Answer the following in short.
Define force. Write its SI unit.
Answer the following in detail.
What are the various effects of force? State one example of each.
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Tick the most appropriate answer.
Force of friction comes into play when a/an
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
Answer the following in detail.
Define friction and explain how it is useful to us.
Answer the following in detail.
Write the characteristics of the force of friction?
