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The beam balance has an arm and two container. The first container to hold the load. There is another container that is used to hold the metal that has a fixed weight.

So how does a beam balance realy work? A long time ago, in the ancient China the beam balance is used during transaction. When the customer wanted to buy certain amount of uncountable items, example: The customer wanted to buy 500g of rice , the seller will take a metal weight 500g and put it in the first container then, he will put the rice in the second container until both sides are balance.

The beam balance has the fulcrum at the middle. So the beam balance is consider as the first-class lever.

Examples of first-classs lever:

1) See-saw

2) Scissors

3) Pillers

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11y ago

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