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प्रश्न
You also try to balance a plate or a round lid on your finger. Where does it balance?
उत्तर
The balance of a plate or a round lid is at its centre.
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संबंधित प्रश्न
You must have seen many such round things around you. List some more in your notebook.
Now see what your friends have drawn. Discuss the length of the radius they measured. Is it the same as yours?
Measure the radius of both circles using a ruler.
Write the length of their radius.
- Radius of the green circle ______
- Radius of the blue circle ______
Measure the radius of the wheels of a bicycle or a bullock-cart. You can use a thread or a measuring tape.
Are all the wheels of a bicycle or a bullock-cart of the same radius?
Have you seen a compass before? How will you use this to make a circle?
- Open your compass.
- Press the tip of the compass on the paper. Hold the compass from the top.
- Without moving the tip, try to move the pencil around.
- Do you get a circle?
Is this circle better than the one you made earlier without a compass?
Draw the radius of this circle and measure it.
Why did Naina get such a drawing? Discuss.
Can you balance a plate on your finger?
Now everybody was excited to spin their tops which looked like this.
 |
 |
 |
 |
| Zakir | Appu | Naina | Guddo |
In whose top is the stick nearest to the centre?
