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www.brighthubeducation.com/.../107178-simple-machines-that-make-work-easier

What is a simple machine and how do they work? There are six basic simple machines that are used to make our lives a little easier. They can alter the input force needed to accomplish a task. Learn more here.

www.livescience.com/49106-simple-machines.html

Humans have invented six devices that combine to make work easier. These six simple machines are the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge.

www.thoughtco.com/six-kinds-of-simple-machines-2699235

Work is performed by applying a force over a distance. These simple machines create a greater output force than the input force; the ratio of these forces is the mechanical advantage of the machine. All six of the simple machines have been used for thousands of years, and the physics behind several of them were quantified by Archimedes. These ...

owlcation.com/stem/Simple-Machines-How-Does-a-Lever-Work

The lever is one of the six simple machines which were defined by Renaissance scientists hundreds of years ago, also including the wheel, the inclined plane, the screw, the wedge and the pulley. You have used a lever in some shape or form without actually realizing it.

www.reference.com/science/simple-machines-make-work-easier-99b3518d705aeb53

Simple machines allow people to make tradeoffs that reduce the amount of work necessary to perform a task. Simple machines may convert one type of force to another, change the direction of an applied force or trade distance travelled for force applied.

bookbuilder.cast.org/view_print.php?book=21173

Simple machines help us make better use of our muscle power to do work . A simple machine produces force and controls the direction of a force.. Simple machines help us lift, pull or raise items, change the direction of the force, increase the force, split things, fasten things, and cut things.

www.reference.com/science/machines-work-e6880437971ea249

A machine is any device that transmits mechanical energy or power into useful work. The simplest machines redirect an applied force or convert kinetic energy into potential energy. More complicated machines are powered by electricity or fuel and use moving parts and electronic circuitry to complete complex tasks.

idahoptv.org/sciencetrek/topics/simple_machines/facts.cfm

Simple Machines: Facts. See the Top 10 Questions. Once upon a time a person needed to move something heavy. He or she picked up a long stick and stuck it under the edge of the heavy object and then pushed down on the other end of the stick. And the first simple machine was invented. Simple machines are just that.

www.wikihow.com/Understand-How-Machines-Work

How to Understand How Machines Work. Understanding how machines work is a first step toward troubleshooting and fixing one that is broken. It's also important to understand machines in order to design or redesign them. Even if you have no...

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