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Explain why sportsmen use shoes with spikes. - Science

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प्रश्न

Explain why sportsmen use shoes with spikes.

स्पष्ट कीजिए

उत्तर

Sportsmen wear shoes with spikes because they give them a better grip while running. The force of friction between the shoes and the ground increases with the help of spikes.

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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 6 | 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.


Write true or false.

Liquids offer more friction than the gases.


Answer the following.

What do you understand by a force?


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

Which type of force acts on a string pulled from both ends?


Answer the following in short.

Define force. Write its SI unit.


Fill in the blank.

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


Tick the most appropriate answer.

Force of friction comes into play when a/an


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

Rolling friction is ............. than sliding friction.


Fill in the blank.

Bicycles use ...................... to reduce friction between the pedals and the crank


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?


Answer the following in detail.

Write the characteristics of the force of friction?


Why is a ball bearing used in a cycle hub?


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


In figure, a boy is shown pushing the box from right to left. The force of friction will act on the box


Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.


Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.


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