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प्रश्न
Write true or false.
The sliding friction is more than the rolling friction.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Name the two kinds of forces in nature.
Give three examples to illustrate that friction is a necessary evil.
A body needs a force F1 just to start moving on a surface, a force F2 to continue its motion and a force F3 to roll on the surface. What is
- the static friction
- sliding friction and
- rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.
Fill in the blank.
More the roughness of a surface, greater is the ........................
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Tick the most appropriate answer.
Force of friction comes into play when a/an
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
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.
Is there any possibility of making a special device to measure the magnitude of friction directly?
