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प्रश्न
Is there any possibility of making a special device to measure the magnitude of friction directly?
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उत्तर
Yes. Tribometer is a special device to measure the magnitude of friction directly.
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संबंधित प्रश्न
A charged glass rod attracts a charged plastic straw.
Write true or false.
The sliding friction is more than the rolling friction.
Fill in the blank.
We use ball bearings to .................. the friction.
Name the two kinds of forces in nature.
Give an example to illustrate the existence of the force of friction.
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
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.
Answer the following in detail.
What are the various effects of force? State one example of each.
Tick the most appropriate answer
Friction always
A moving body comes to rest due to friction alone.
