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प्रश्न
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
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उत्तर
It is due to friction between the brakes and the rim of the wheel that it becomes hot.
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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.
List three ways of reducing friction.
Define rolling 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.
Tick the most appropriate answer.
Force of friction comes into play when a/an
Fill in the blank
Rolling friction is ............. than sliding friction.
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
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.
