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प्रश्न
Select the correct alternative.
Friction is reduced by
पर्याय
making the surfaces wet
making the surfaces dry
making the surfaces rough
sprinkling sand on the surface.
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उत्तर
making the surfaces wet
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संबंधित प्रश्न
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Give an example to illustrate the existence of the force of friction.
Define rolling friction
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
Friction produces
Fill in the blank.
Friction depends upon the ............... of an object.
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.
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
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.
