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प्रश्न
Tick the most appropriate answer.
Force of friction comes into play when a/an
पर्याय
object attempts motion
moving object tries to stop
object is at rest
all of the these
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उत्तर
all of the these
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संबंधित प्रश्न
Fill in the blank.
We use ball bearings to .................. the friction.
Give three examples to illustrate that friction is a necessary evil.
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
Friction produces
Fill in the blank.
Friction is a type of .................
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
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.
