Advertisements
Advertisements
प्रश्न
Give examples to show that friction is both a friend and a foe.
Advertisements
उत्तर
Examples to show that friction is a friend:
- Friction enables us to grip and catch various objects.
- It allows us to walk pleasantly on the surface.
- It helps reduce the speed of moving items.
- It will enable us to write on paper or blackboards.
- Friction prevents objects from moving from their original positions.
Examples to show that friction is a foe:
- Friction wears and tears items.
- It damages machine parts.
- Machines and tools require constant maintenance, which wastes a lot of money.
- It slows down moving objects, requiring more significant force.
- It prohibits the free movement of items.
APPEARS IN
संबंधित प्रश्न
Friction depends on the ______ of surfaces.
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Name the two kinds of forces in nature.
State two factors which directly affect the force of friction.
Name the three kinds of friction.
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
Define static friction
Define rolling friction
Fill in the blank.
.................... is the SI unit of force.
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.
Rolling friction offers ............. resistance than sliding friction.
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction for an object can be reduced by
Tick the most appropriate answer.
Friction produces
Fill in the blank.
Friction is a type of .................
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
