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200 years

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Q: How long have simple machines been around?
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How long have people been using simple machines?

people have been using it forever

How is a slant related to a wedge?

The screw is one of the so-called "simple machines" from which many more complex machines are derived. A screw is essentially a long inclinewrapped around a shaft, so its mechanical advantage can be approached in the same way as the incline.

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Drums have been around probably since the time of early man. It is such a simple instrument. Another early human instrument is the bone-flute.

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Gardening has been around since early man, when the neanderthals(and even earlier forms of man) grew simple crops to get by in their small villages.

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A stationary bike is one of the best and old ways to lose weight. This bike has been around for a long time and it has been the most effective out of any machines.

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How simple machines were made a long time ago?

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