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प्रश्न
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
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उत्तर
The nail becomes hot due to friction. Friction changes kinetic energy to heat.
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संबंधित प्रश्न
Give examples to show that friction is both a friend and a foe.
Name the two kinds of forces in nature.
Name the three kinds of friction.
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
State if the following statement is true or false. Correct the statement if it is false.
If two forces acting in opposite directions on a body arc of equal magnitude, then the body will not move.
Answer the following in short.
What do you understand by normal force?
Fill in the blank
Rolling friction is ............. than sliding friction.
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.
Answer the following in detail.
Define friction and explain how it is useful to us.
