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प्रश्न
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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उत्तर
Knot in a thread : Increase friction : : Ball bearing : Reduces friction
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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.
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Liquids offer more friction than the gases.
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Rolling friction offers ............. resistance than sliding friction.
Tick the most appropriate answer.
Friction for an object can be reduced by
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Friction depends upon the ............... of an object.
Answer the following in short.
List the various states of matter that offer frictional force?
Rolling friction is slightly greater than sliding friction.
