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प्रश्न
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
विकल्प
only if the objects are solid.
only if one of the two objects is liquid.
only if one of the two objects is gaseous.
irrespective of whether the objects are solid, liquid or gaseous.
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उत्तर
irrespective of whether the objects are solid, liquid or gaseous.
Explanation:
Force of friction acts in solids, liquids and gases and opposes the motion with respect to each other.
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संबंधित प्रश्न
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Name the three kinds of friction.
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Sliding friction and rolling friction are types of .................. friction.
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Rolling friction is ............. than sliding friction.
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Rolling friction is ........... than sliding friction.
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Smoother the surface, ................. is the frictional force offered by it.
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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.
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Answer the following in short.
List the various states of matter that offer frictional force?
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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.
