मराठी

Friction opposes the ______ between the surfaces in contact with each other. - Science

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प्रश्न

Friction opposes the ______ between the surfaces in contact with each other.

रिकाम्या जागा भरा

उत्तर

Friction opposes the motion between the surfaces in contact with each other.

Explanation:

This means that when two objects move or try to move past each other, friction resists their movement, acting in the opposite direction to slow them down or prevent motion altogether.

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Force of Friction
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पाठ 12: Friction - Exercises [पृष्ठ १५५]

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एनसीईआरटी Science [English] Class 8
पाठ 12 Friction
Exercises | Q 1.1 | पृष्ठ १५५

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.


When a glass rod is rubbed with a piece of silk cloth the rod ______.


A charged glass rod attracts a charged plastic straw.


Fill in the blank.

We use ball bearings to .................. the friction.


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


Define static friction


State if the following statement is true or false. Correct the statement if it is false.

If two forces acting in opposite directions on a body arc of equal magnitude, then the body will not move.


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

Why does a rolling ball stop after moving some distance?


Fill in the blank.

More the roughness of a surface, greater is the ........................


Fill in the blank.

The force of friction acting between two bodies in contact while at rest is known as ................ friction.


Fill in the blank.

Sliding friction and rolling friction are types of .................. friction.


Tick the most appropriate answer.

Friction produces


Tick the most appropriate answer.

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


Answer the following in short.

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


Answer the following in detail.

Describe three different ways by which friction can be increased to help us in various situations?


Match the following.

  Column I Column II
a) Static friction Viscosity
b) Kinetic friction Least friction
c) Rolling friction Objects are in motion
d) Friction between the liquid layers Objects are sliding
e) Sliding friction Objects are at rest

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.


Analogy

Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.


Complete the analogy.

Knot in a thread : ______ friction :: Ball bearing : ______ friction.


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