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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
Friction depends on the ______ of surfaces.
Explain why sportsmen use shoes with spikes.
Write true or false.
The sliding friction is more than the rolling friction.
Name the two kinds of forces in nature.
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.
Friction is a type of .................
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Match the following.
| Column I | Column II | |
| a) | Static friction | Viscosity |
| b) | Kinetic friction | Least friction |
| c) | Rolling friction | Objects are in motion |
| d) | Friction between the liquid layers | Objects are sliding |
| e) | Sliding friction | Objects are at rest |
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
