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प्रश्न
Fill in the blank.
Friction depends upon the ............... of an object.
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उत्तर
Friction depends upon the weight of an object.
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संबंधित प्रश्न
Define rolling friction
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction for an object can be reduced by
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
State if the following statement is true or false. Correct the statement if it is false.
Friction has no relation with our walking or running.
State if the following statement is true or false. Correct the statement if it is false.
Friction helps us to grip the objects in our hand.
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 |
Why is a ball bearing used in a cycle hub?
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
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.
