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प्रश्न
Fill in the blank.
Rolling friction offers ............. resistance than sliding friction.
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उत्तर
Rolling friction offers less resistance than sliding 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.
Fill in the blank.
We use ball bearings to .................. the friction.
Name the two kinds of forces in nature.
Give an example to illustrate the existence of the force of friction.
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.
Bicycles use ...................... to reduce friction between the pedals and the crank
Answer the following in short.
List the various states of matter that offer frictional force?
Answer the following in detail.
Define friction and explain how it is useful to us.
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
