Simple explanations of what work is, how work relates to power, and different types of energy, followed by a short quiz to check your understanding.
The Interactive Library
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A very comprehensive (47 slides) PowerPoint tutorial that covers the relationship between work, simple machines and mechanical advantage. Includes easy to understand illustrations and explanations of the 6 simple machines and practice questions for comprehension.
Science Education at Jefferson Lab
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Learning games, educational comics, reading activities, and more.
FunBrain.com
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4th grade science
StudyStack
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