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प्रश्न
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
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उत्तर
When we take off our sweaters in winter, we hear a crackling sound. This is because removing our sweater acquires charge due to friction between the sweater and our body. As a result, we hear a crackling sound from the sweater.
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संबंधित प्रश्न
Give examples to show that friction is both a friend and a foe.
Select the correct alternative.
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Friction produces
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Rolling friction is ............. than sliding friction.
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| 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 |
Is there any possibility of making a special device to measure the magnitude of friction directly?
