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
Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
Give examples to show that friction is both a friend and a foe.
Fill in the blank.
We use ball bearings to .................. the friction.
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
Answer the following.
What do you understand by a force?
Fill in the blank.
Rolling friction offers ............. resistance than sliding friction.
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
Friction for an object can be reduced by
Fill in the blank
Rolling friction is ............. than sliding friction.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
