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प्रश्न
Tick the most appropriate answer
Friction always
पर्याय
supports motion
starts motion
encourages motion
opposes motion
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उत्तर
opposes motion
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संबंधित प्रश्न
Friction opposes the ______ between the surfaces in contact with each other.
Friction depends on the ______ of surfaces.
Fill in the blank.
We use ball bearings to .................. the friction.
Tick the most appropriate answer.
Force of friction comes into play when a/an
Fill in the blank.
Rolling friction is ........... than sliding friction.
A moving body comes to rest due to friction alone.
Why is a ball bearing used in a cycle hub?
We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
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.
