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प्रश्न
Answer the following in short.
Define force. Write its SI unit.
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उत्तर
A push or pull acting upon an object as a result of its interaction with another object is called force. Its SI unit is the newton (N).
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संबंधित प्रश्न
Write true or false.
Liquids offer more friction than the gases.
Give three examples to illustrate that friction is a necessary evil.
State if the following statement is true or false. Correct the statement if it is false.
Like charges always attract each other.
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Tick the most appropriate answer.
Friction for an object can be reduced by
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.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
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.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
