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प्रश्न
Define sliding friction
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उत्तर
The minimum force required to keep the body moving over a surface such that it moves equal distances in equal intervals of time is called the force of sliding friction.
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संबंधित प्रश्न
Select the correct alternative.
Friction is reduced by
Give three examples to illustrate that friction is a necessary evil.
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.
Why does a rolling ball stop after moving some distance?
Tick the most appropriate answer.
Force of friction comes into play when a/an
Tick the most appropriate answer.
Friction produces
State if the following statement is true or false. Correct the statement if it is false.
Friction helps us to grip the objects in our hand.
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.
Answer the following in short.
List the various states of matter that offer frictional force?
Is there any possibility of making a special device to measure the magnitude of friction directly?
