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प्रश्न
State two factors which directly affect the force of friction.
उत्तर
Two factors which directly affect the force of friction are:
- The smoothness of the surface.
- The presence of solid, liquid, or gas around the moving body.
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संबंधित प्रश्न
Friction opposes the ______ between the surfaces in contact with each other.
Give examples to show that friction is both a friend and a foe.
Give an example to illustrate the existence of the force of friction.
Fill in the blank.
The force of friction acting between two bodies in contact while at rest is known as ................ friction.
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.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
A moving body comes to rest due to friction alone.
Is there any possibility of making a special device to measure the magnitude of friction directly?
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.
Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.
