mechanical advantage

/Tag: mechanical advantage
17 08, 2017

Wheel and axle – Simple machines – Physics

By |2019-09-14T06:42:42-07:00August 17th, 2017|Physics|7 Comments

An Egyptian potter uses a pottery wheel, about 2000 BC. He uses his hand to spin the wheel. Wheels do not exist in nature, and no animals use them except people (though some animals do use gears, which are a special kind of wheel). People didn't use wheels until the Neolithic, about 10,000 [...]

17 08, 2017

What is a wedge? – Simple machine – Physics

By |2019-04-08T09:55:29-07:00August 17th, 2017|Physics|25 Comments

What is a wedge? This stone hand-ax from Chennai, India is a kind of wedge. A wedge is a kind of inclined plane What is a wedge? Like screws, wedges are really a kind of inclined plane, but they are so useful that people give them their own category among the simple machines. A wedge [...]

17 08, 2017

Screw – Simple machines – Physics

By |2019-04-24T20:06:22-07:00August 17th, 2017|Physics, What|0 Comments

A cider press with big wooden screws What is a screw? People always count screws as a separate kind of simple machine. But really screws are just one kind of inclined plane. They are such an important kind that we give them their own category. Inclined planes Simple machines All our physics articles Who invented [...]

17 08, 2017

Movable pulley – Simple machines – Physics

By |2018-05-31T11:49:15-07:00August 17th, 2017|Physics|0 Comments

Bike hoist pulleys A movable pulley is a way to use a pulley to make it easier to move heavy things - to get a mechanical advantage. In the picture, someone is trying to pull their bike up to the ceiling so it will be out of the way. They've used two fixed pulleys, attached to [...]

17 08, 2017

Pulley – Simple machines – Physics

By |2018-05-31T11:49:15-07:00August 17th, 2017|Physics|0 Comments

Clothesline pulley A pulley is really a kind of wheel, just as a screw is a kind of inclined plane. But pulleys are so important that people give them their own category. A pulley is a wheel with two raised edges. The raised edges are so that a rope or a string will run along the wheel [...]