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प्रश्न
Tick the most appropriate answer
Friction always
विकल्प
supports motion
starts motion
encourages motion
opposes motion
उत्तर
opposes motion
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संबंधित प्रश्न
Write true or false.
The sliding friction is more than the rolling friction.
Name the two kinds of forces in nature.
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.
What do you understand by a force?
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Friction is a type of .................
Why is a ball bearing used in a cycle hub?
In figure, a boy is shown pushing the box from right to left. The force of friction will act on the box
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.
