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प्रश्न
Answer the following in short.
List the various states of matter that offer frictional force?
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उत्तर
The force of friction is offered by all the three states of matter – solids, liquids, and gases.
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संबंधित प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
Name the three kinds of friction.
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
Rolling friction is ............. than sliding friction.
Answer the following in a word or two or in a sentence.
Name the force responsible for opposing the motion between two bodies in contact.
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.
Answer the following in detail.
Define friction and explain how it is useful to us.
Why is a ball bearing used in a cycle hub?
Friction depends on the ______ of two surfaces in contact.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
