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Science projects, videos and experiments for various grades and topics.

Science Projects or Science Experiments: Grades 4 & 5

Simple Machines

Eureka! Episode 11 - The Inclined Plane
This program demonstrates how an inclined plane allows you to trade increased distance for decreased force
Eureka! Episode 12 - The Lever
Eureka! demonstrates the principle of the lever: "The longer the arm of the lever to which force is applied, the less that force need be."



Eureka! Episode 13 - Mechanical Advantage and Friction
Professors A and B compare the mechanical advantage of an inclined plane with that of a lever.
Eureka! Episode 14 - The Screw and The Wheel
This program provides examples and definitions of a screw and a wheel; a screw is simply a twisted inclined plane; a wheel is simply a circular lever, whose fulcrum has become an axle.


 
Eureka! Episode 15 - The Pulley
Eureka! shows viewers how a pulley works to lift a heavy object. If you double the number of ropes supporting the weight, you double the mechanical advantage.



Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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