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Published byAndrew Riley Modified over 9 years ago
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Work and Power What is Energy? Conservation of Energy
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What is work? ◦ A force through a distance. Is it work? ◦ You sitting in class. ◦ A person shot putting. ◦ Picking up your phone. ◦ The Hulk throwing Loki around The Hulk throwing Loki around
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Individually write down five examples of work and five examples of non-work. After I tell you to share your examples with your partner. Then we will bring it up as a class.
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Work as stated is a force through a distance. ◦ W = F x d The units for work are the joule. ◦ N x m= J ◦ Unit for all types of Energy
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Imagine a father playing with his daughter by lifting her repeatedly in the air. How much work does he do with each lift, assuming he lifts her 2.0 m and exerts an average force of 190 N?
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Page 379 p. 1-5
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Running up a flight of stairs doesn’t require more work than walking, but it is more exhausting. The unit used to measure work in relation to time is called power. Power = work/time P=w/t Power is measured in watts (W)
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Pg. 381 #1-5
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