Advertisements
Advertisements
प्रश्न
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
उत्तर
Knot in a thread : increase friction : : Ball bearing : reduces friction
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.
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?
Tick the most appropriate answer.
Friction produces
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Rolling friction is ........... than sliding friction.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Answer the following in detail.
Define friction and explain how it is useful to us.
Explain how friction can be minimized.
