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प्रश्न
Fill in the blank.
.................... is the SI unit of force.
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उत्तर
Newton is the SI unit of force.
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संबंधित प्रश्न
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Name the two kinds of forces in nature.
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
Define sliding 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 a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Fill in the blank.
Rolling friction is ........... than sliding friction.
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.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
