Advertisements
Advertisements
प्रश्न
Fill in the blank.
More the roughness of a surface, greater is the ........................
Advertisements
उत्तर
More the roughness of a surface, greater is the friction.
APPEARS IN
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.
The eraser gets smaller and smaller as you use it more and more. 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.
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Answer the following in detail.
What are the various effects of force? State one example of each.
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
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.
Answer the following in short.
Define rolling friction and give an example where rolling. friction comes into play.
A moving body comes to rest due to friction alone.
Complete the analogy.
Knot in a thread : ______ friction :: Ball bearing : ______ friction.
