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प्रश्न
Tick the most appropriate answer.
Force of friction comes into play when a/an
विकल्प
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.
Answer the following in short.
Define force. Write its SI unit.
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Fill in the blank
Rolling friction is ............. than sliding friction.
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 helps us to grip the objects in our hand.
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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.
