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प्रश्न
Take a 5 rupee coin and a small piece of paper. The paper should be about one-fourth the size of the coin.
- Hold the coin in one hand and the paper in the other. Drop them at the same time. What happened?
- Now place the tiny paper on the coin and drop them. What happened this time? Surprised!
उत्तर
- In the first case, the coin fell down more quickly than the piece of paper.
- In the second case, both paper and coin fell down at the same time.
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संबंधित प्रश्न
If the earth is round like a globe, how is it that we do not fall off?
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- What about your hair?
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- Where is the sea?
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- Do you think Sunita could make out Pakistan, Nepal, and Burma separately when she saw the earth from space?
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- Where all do you find the sea?
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- Can you see some of the countries with which India plays cricket matches? For example England, Australia, Pakistan, Bangladesh, and South Africa.
- What else can you see on the globe?
Look at the moon tonight and draw what it looks like. Look and draw again after one week, and then after 15 days.
| Today’s Date | Date after a week | Date after 15 days |
At night look at the sky carefully for 5 minutes.
- What could you see?
- Did you see anything moving in the sky? What do you think it could be? A star or a shooting star or a satellite (satellites are used for the TV, telephones, and for weather reports). Find out more about this.
Given below are the times at which the moon rises and sets in Delhi (on the given days).
| Date |
Time of moonrise (hours: minutes) |
Time of moon (hours: minutes)set |
| 28-10-2007 | 19:16 | 08:50 |
| 29-10-2007 | 20:17 | 10:03 |
| 30-10-2007 | 21:22 | 11:08 |
| 31-10-2007 | 22:29 | 12:03 |
- On 28 October the moon came out at ___ minutes past ___ o’clock.
- On 29 October the moon came out at ___ minutes past ___ o’clock.
- On 29 October there was a difference of ___ hours and ___ minutes in the time of the moonrise (as compared to 28 October).
Why don’t you try to do the same with a coin? How many centimeters away from the eye did you keep the coin to hide the moon?
If you saw the moon rising at 7 pm today, would you see it at the same time tomorrow?
