How Things Work

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When a coin slows down while spinning, it begins to shake or wobble before it finally stops spinning completely.

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Examples include: coin, bangle, wooden spinner (top), wheel, ceiling fan, potter's wheel. Any round or balanced object can spin well.

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A spinner with the toothpick at the center spins better because it is balanced. When the hole is at the center, the spinner appears the same from all sides and remains upright while spinning.

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A charkha is a spinning wheel used to twist cotton fiber into thread. It has a large wheel that spins when turned by hand. Mahatma Gandhi used the charkha to make handmade clothes.

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When a square card spinner spins fast, it appears circular while spinning due to the rapid motion that makes our eyes see a circular shape.

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Lattu is a popular Indian spinning top that is commonly made of wood. Spinning tops have been used in India for thousands of years, and in earlier times they were made of clay.

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No, floating or sinking cannot be decided based just on whether an object is heavy or light. It also depends on other factors like shape and the amount of air trapped inside.

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Heavy object that floats: Empty steel bowl. Light object that sinks: Iron nail or pin. This shows that weight alone doesn't determine floating or sinking.