Advertisements
Advertisements
प्रश्न
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Advertisements
उत्तर
Weight remaining the same, friction is independent of area of surface in contact.
APPEARS IN
संबंधित प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
Write true or false.
The sliding friction is more than the rolling friction.
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.
Answer the following in short.
What do you understand by normal force?
Fill in the blank.
More the roughness of a surface, greater is the ........................
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Answer the following in a word or two or in a sentence.
Name the force responsible for opposing the motion between two bodies in contact.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
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.
