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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.
Define rolling friction
Fill in the blank.
More the roughness of a surface, greater is the ........................
Fill in the blank.
Rolling friction offers ............. resistance than sliding friction.
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction for an object can be reduced by
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Friction depends upon the ............... of an object.
