Skip to main content
Like
Create new Glog
previous
next
Email share
517 views | 0 likes | 0 reposts
Simple Machines
Pulleys and Levers
Simple machines are simple and easy to use but make up all modern and complicated machines.
A lever consists of a fulcrum, a resistance, and an effort. There are three kinds of levers. These are first, second, and third class levers. Each has the fulcrum, effort, and resistance in a different place. A lever is used to make work easier by making it so only half the work is required to lift an object. An example is a crowbar. Pulleys are made of a rope and a wheel. The rope rests on the wheel and moves it to make work easier or faster. There are two kinds of pulleys. The moveable pulley makes work easier but you have to move with it. The straight pulley makes a load go in a different way. You can use more than one pulley. An example of a pulley is a flag to be pulled up a flagpole.
Inclined Plane and Screws
A wheel and axle is cousin to the lever. It is many levers together. There is a rod that allows the wheel to turn on it. An example of a wheel and axle is a steering wheel. It make work easier to steer a car. A wedge pushes things apart. An example of sa wedge is an axe. It is used to split and cut wood. It is easier and faster to use a wedge to cut and split.
Wheel and Axle and Wedges
An inclined plane is a flat surface that one end is higher than the other. It helps move an object from a higher place to a lower place or a lower place to a higher place. It also known as a ramp, and is used for moving, wheelchairs, cars, and more. Inclined planes make work easier by reducing the amount of work. A screw is an inclined plane wraped around itself. It is rigid and used to securely hold things in it's place. It takes more work to install, but holds tighter than a screw. These are a common household item.
