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प्रश्न
Tick the most appropriate answer.
Friction produces
पर्याय
heat
change of state
electricity
pressure
उत्तर
heat
APPEARS IN
संबंधित प्रश्न
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Answer the following.
What do you understand by a force?
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.
Friction is offered by
Fill in the blank.
Rolling friction is ........... than sliding friction.
Answer the following in a word or two or in a sentence.
Why is difficult for a pen to leave a mark on a highly smooth plastic sheet?
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.
Complete the analogy.
Knot in a thread : ______ friction :: Ball bearing : ______ friction.
