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प्रश्न
Fill in the blank.
Friction is a type of .................
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उत्तर
Friction is a type of contact force.
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संबंधित प्रश्न
Give examples to show that friction is both a friend and a foe.
State two factors which directly affect the force of friction.
Name the three kinds of friction.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Fill in the blank.
More the roughness of a surface, greater is the ........................
State if the following statement is true or false. Correct the statement if it is false.
Friction is offered by all the three states of matter.
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.
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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.
