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प्रश्न
What is the cause of friction?
उत्तर
The cause of friction is the interlocking of the irregular projections on the two surfaces in contact.
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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.
Fill in the blank.
We use ball bearings to .................. the friction.
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
Define static friction
Fill in the blank.
Rolling friction is ........... than sliding friction.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Answer the following in detail.
Define friction and explain how it is useful to us.
Answer the following in detail.
Write the characteristics of the force of friction?
Explain how friction can be minimized.
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.
