Question

*why are wheels important? how they are able to carry such heavy loads like trains and road rollers? for class 9​

Answer 1

Answer:

Wheels are everywhere in our world today—in very obvious places (on cars, trucks, and airplanes), but also hidden inside everything from computer hard-drives and clothes washers to electric toothbrushes and dishwashers. Six thousand years ago, there weren't any wheels at all. The rise of the wheel, from a basic turntable that helped people mold clay pots to a key component in hundreds of important inventions, owes everything to the simple and effective way it helps us capture and harness energy and transform forces.

Explanation:

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