Work and Simple Machines

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Presentation transcript:

Work and Simple Machines

Work The amount of energy transferred by a force over a certain distance Measured in joules If an object doesn’t move a distance, no work was done W=FxD

Work= Force multiplied by distance How much work is done by a person who pushes a lawnmower with a force of 50N at a distance of 450m? 55,000 J of work is done to move a rock 25m. How much force was applied?

Simple Machines -make work easier by changing the size or direction of a force -you do work on the machine, the machine does work on something else -Mechanical advantage is the number of times the machine multiplies your force. https://www.youtube.com/watch?v=yhzMYHiuEC4

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