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प्रश्न
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
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उत्तर
Weight remaining the same, friction is independent of area of surface in contact.
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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.
Give examples to show that friction is both a friend and a foe.
Name the two kinds of forces in nature.
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Friction is a type of .................
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?
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.
