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प्रश्न
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
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उत्तर
Sliding friction and rolling friction are types of kinetic friction.
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संबंधित प्रश्न
Name the two kinds of forces in nature.
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
A body needs a force F1 just to start moving on a surface, a force F2 to continue its motion and a force F3 to roll on the surface. What is
- the static friction
- sliding friction and
- rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.
Fill in the blank.
.................... is the SI unit of force.
Tick the most appropriate answer.
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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.
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
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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: 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.
