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tigoe.com/pcomp/machines.shtml

Basic Machines 1: Lever, Pulley, Gear, and Cam : There are a number of mechanisms common to mechanical systems of all sorts that are useful to know about when you want to control motion of any sort. While this page is by no means comprehensive, it will help get you started on understanding a few basics of how to move things.

www.explainthatstuff.com/pulleys.html

Artwork: How pulleys work#3: With four wheels and the rope working in four sections, a pulley cuts the lifting force you need to one quarter. But you have to pull the end of the rope four times as far. How a pulley is like a lever. You can probably see that a pulley magnifies force in a similar way to a seesaw, which is a kind of lever.

www.pkwy.k12.mo.us/homepage/dplacke/File/Levers_and_Pulleys_Unit...

A lever and pulley are mechanical advantages=makes work easier, and helps lift things you couldn ’t normally lift Combined simple machines can be put together to make compound machines Levers and pulleys are used in curtains on stages If you have a big pulley it would help you lift something on the other side.

www.explainthatstuff.com/toolsmachines.html

There are five main types of simple machine: levers, wheels and axles (which count as one), pulleys, ramps and wedges (which also count as one), and screws. Let's look at them more closely. Levers. A lever is the simplest machine of all: it's just a long bar that helps you exert a bigger force when you turn it.

www.fossweb.com/delegate/ssi-foss-ucm/ucm?dDocName=D1445892

LEVERS AND PULLEYS OVERVIEW FOSS AND NATIONAL STANDARDS The Levers and Pulleys Module helps students develop the skills of inquiry and controlled experimentation. This module supports the following National Science Education Standards. SCIENCE AS INQUIRY Develop students’ abilities to do and understand scientific inquiry.

media.knex.com/.../Education-Intro-to-Levers-and-Pulleys-Teachers...

Levers and Pulleys Kit • Developed to introduce pupils to the way levers and pulleys have been used . in the design of familiar products, this ... Understanding Mechanisms Education® levers and pulleys. website: www.knexeducation.co.uk. 4 A Quick Guide to Levers.

www.stem.org.uk/.../collection/13378/gears-levers-and-pulleys

Watch how gears, levers and pulleys work as simple machines which help us move things more easily. Try an interactive activity or build your own simple levers and pulleys. Included is teacher subject knowledge to support teachers for whom this is a new topic area. This a new curriculum area is in the programme of study in Year 5.

www.clear.rice.edu/elec201/Book/basic_mech.html

As the length of the lever increases, it becomes more likely that the lever will break somewhere along its length. Figure 3.11 illustrates how a compound pulley `trades' force for distance through an action/reaction force pair. In a double pulley, as the rope passes over the pulley the force is transmitted entirely but the direction has changed.

www.youtube.com/watch?v=fvOmaf2GfCY

Simple machines have been helping people to do work for thousands of years! The lever, wheel and axle, pulley, inclined plane, wedge, and screw each have a job to do.