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प्रश्न
Answer the following.
What do you understand by a force?
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उत्तर
Force is a push or pulls acting upon an object as a result of its interaction with another object.
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संबंधित प्रश्न
Explain why sportsmen use shoes with spikes.
Give examples to show that friction is both a friend and a foe.
What is the cause of friction?
Fill in the blank.
More the roughness of a surface, greater is the ........................
Tick the most appropriate answer
Friction always
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 has no relation with our walking or running.
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.
Match the following.
| Column I | Column II | |
| a) | Static friction | Viscosity |
| b) | Kinetic friction | Least friction |
| c) | Rolling friction | Objects are in motion |
| d) | Friction between the liquid layers | Objects are sliding |
| e) | Sliding friction | Objects are at rest |
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
