मराठी

Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play - Science

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प्रश्न

Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play

पर्याय

  • only if the objects are solid.

  • only if one of the two objects is liquid.

  • only if one of the two objects is gaseous.

  • irrespective of whether the objects are solid, liquid or gaseous.

MCQ
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उत्तर

irrespective of whether the objects are solid, liquid or gaseous.

Explanation:

Force of friction acts in solids, liquids and gases and opposes the motion with respect to each other.

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Force of Friction
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पाठ 12: Friction - Multiple Choice Questions [पृष्ठ ६८]

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एनसीईआरटी एक्झांप्लर Science [English] Class 8
पाठ 12 Friction
Multiple Choice Questions | Q 1. | पृष्ठ ६८

संबंधित प्रश्‍न

A charged glass rod attracts a charged plastic straw.


Give an example to illustrate the existence of the force of friction.


State two factors which directly affect the force of friction.


When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.


Answer the following in a word or two or in a sentence.

Why does a rolling ball stop after moving some distance?


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

Friction always


Tick the most appropriate answer.

If you pour some oil onto a floor, the friction would


Fill in the blank.

Smoother the surface, ................. is the frictional force offered by it.


Fill in the blank.

Friction depends upon the ............... of an object.


Answer the following in a word or two or in a sentence.

Name a method used to reduce friction.


Answer the following in short.

Define rolling friction and give an example where rolling. friction comes into play.


Answer the following in short.

List the various states of matter that offer frictional force?


A moving body comes to rest due to friction alone.


Rolling friction is slightly greater than sliding friction.


We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.


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