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प्रश्न
Look around you – where all do you see the use of pulleys? List them.
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उत्तर
Pulleys are used
- to fetch water from wells
- in moving trolleys
- in elevators
- in flagpoles to hoist flags
- to lift heavy loads in construction sites
- in moving curtains in theatres
- in cranes and bulldozers
APPEARS IN
संबंधित प्रश्न
Make a small bridge by tying 4 or 5 bamboo poles together. Ask your teacher to help you. Now walk on your bridge.
- How did you feel?
- Did you fall down?
With the help of a pulley, try and lift various things, as shown in the picture.
How many people do you think can cross the bridge at one time?
You have seen how children use a different kind of bridges, to cross rivers and other uneven areas to reach school.
Is there any bridge near your house? Find out more about the bridge.
- Where is the bridge – over water, over a road, between two mountains or somewhere else?
- Who all use the bridge? Is it used by people on foot and also by vehicles and animals?
- Does the bridge seem to be old or is it new?
- Find out what materials are used in making this bridge. List some of them.
Draw a picture of the bridge in your notebook. Do not forget to draw the train, vehicles, animals or people who cross the bridge.
Imagine what difficulties there would be if the bridge was not there? Let us find out some other ways by which children get to school.
Have you ever sat in a camel-cart or horse carriage (tonga)? Where? Did you climb on it yourself, or did someone help you?
Can you ride a bicycle? If yes, who taught you to ride?
Can you recognise some birds by their sounds? Can you imitate the sounds of some birds? Do it.
