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Published bySibyl Todd Modified over 9 years ago
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Work
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Lifting books out of your backpack? Carrying your backpack to class? Pushing a car that is stuck in the snow? Rolling a bowling ball? What is Work?
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Is this cat doing work?
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Work is done on an object when the object moves in the same direction in which the force is exerted. What is Work?
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Sometimes force is applied to an object, but no work is done. If you push on a block and it doesn’t move, you have not done ANY work in the scientific sense. Which force is most likely to do work on the block?
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Work is done by forces over a distance. Work is done on objects. When force is measured in newtons and distance in meters the SI unit for work is the newton*meter A newton*meter is called a Joule Calculating Work
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To calculate work, you multiply the force by the distance the object moves in the direction of the force. Calculating Work How much work is done if the block is raised 3 meters?
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Force (F)= 50 N distance (d)= 0.5 m How much work is done on a 10-newton block that is lifted 5 meters off the ground by a pulley? Practice Time!
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