# Simple And Compound Machines

## Video: Simple And Compound Machines

When 'Hardware Hal' holds a 'Simple and Compound Machines Sale' he demonstrates to his assistants the six simple machines: the lever, wedge, inclined plane, pulley, wheel & axle, and screw. Shows how these machines make work easier by changing force, direction, or distance. Machines in action and computer graphics illustrate the principles of work, effort, force, distance, power, friction, and much more.

###### Student Application

See the six simple machines: the lever, wedge, inclined plain, pulley, wheel and axle, and screw.

###### Learning Objectives

1. Students will know that work is done when a force (effort) causes an object to move a distance. Work = Force x Distance.
2. Students will understand that a machine is a tool that helps do work by reducing the effort that is required. Friction can slow a machine's ability to reduce effort.
3. Students will reali...

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###### Supporting Activities

1. Before viewing the video

1. Anticipatory set: Have the children write down any simple machines that they know and draw diagrams of them. Collect and save for review after watching the video.
2. After viewing the video

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