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प्रश्न
Tick the most appropriate answer.
Friction produces
विकल्प
heat
change of state
electricity
pressure
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उत्तर
heat
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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.
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Fill in the blank.
We use ball bearings to .................. the friction.
Give an example to illustrate the existence of the force of friction.
List three ways of reducing friction.
Answer the following.
What do you understand by a force?
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.
Friction is offered by all the three states of matter.
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
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.
