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A moving body comes to rest due to friction alone.
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Rolling friction is slightly greater than sliding friction.
Concept: undefined >> undefined
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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 |
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Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
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Why is a ball bearing used in a cycle hub?
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Explain how friction can be minimized.
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Is there any possibility of making a special device to measure the magnitude of friction directly?
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What is dispersion? Explain in detail.
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In parallel circuit, current remains the same in all components.
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Give some uses of electroplating.
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Explain series and parallel circuit.
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What is electroplating? Explain how it is done.
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A wave with a frequency of 500 Hz is traveling at a speed of 200 ms-1. What is the wavelength?
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The study about stars and planets are known as _____.
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List out the objectives of Mangalyaan.
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Match the following.
| Iron | For making wires |
| Copper | Sewing needle |
| Tungsten | As a fuel for ignition in rocket |
| Boron | Making the filament of a bulb |
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Mention any four compounds and their uses.
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Mention the uses of the following compounds.
- Baking soda
- Bleaching powder
- Quick lime
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