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प्रश्न
Rolling friction is slightly greater than sliding friction.
विकल्प
True
False
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उत्तर
Rolling friction is slightly greater than the sliding friction- False.
Correct statement:
Rolling friction is slightly lesser than sliding friction.
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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.
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.
.................... is the SI unit of force.
Answer the following in short.
Define force. Write its SI unit.
Answer the following in short.
What do you understand by normal force?
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
Is there any possibility of making a special device to measure the magnitude of friction directly?
