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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.

रिक्त स्थान भरें
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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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अध्याय 12: Friction - Exercises [पृष्ठ १५५]

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

संबंधित प्रश्न

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?


Fill in the blank.

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


A body needs a force F1 just to start moving on a surface, a force F2 to continue its motion and a force F3 to roll on the surface. What is

  1. the static friction
  2. sliding friction and
  3. rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.

Fill in the blank.

.................... is the SI unit of force.


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

Like charges always attract each other.


Fill in the blank.

Rolling friction offers ............. resistance than sliding friction.


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.

Force of friction comes into play when a/an


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.

Friction is a type of .................


Answer the following in detail.

Write the characteristics of the force of friction?


Rolling friction is slightly greater than sliding friction.


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

Explain how friction can be minimized.


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


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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