Friday, September 28, 2012
Thursday, September 27, 2012
Wednesday, September 26, 2012
Pulleys
Did you know that a pulley does not change the amount of work done? (Work is the measure of the force to move an object multiplied by the distance the object is moved.) A pulley works with the force of gravity. That is why it is easier to move objects with a pulley. Can you name some real life pulleys?
Saturday, September 22, 2012
9/22/12
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