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Chapter 12: Work and Energy

Chapter 12: Work and Energy. Overview. Work and Power What is Energy? Conservation of Energy. Kinematics. Do you recall what kinematics is? The study of the relationship between forces and energy of motion. Work is really an extension of Kinematics. Work. What is work?

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Chapter 12: Work and Energy

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  1. Chapter 12: Work and Energy

  2. Overview • Work and Power • What is Energy? • Conservation of Energy

  3. Kinematics • Do you recall what kinematics is? • The study of the relationship between forces and energy of motion. • Work is really an extension of Kinematics.

  4. Work • What is work? • A force through a distance. • Is it work? • You sitting in class. • A person shot putting. • Blake holding Dane over his head. • Hulk Hogan Body Slamming Andre the Giant.

  5. Concept Check • Individually write down five examples of work and five examples of non-work. • After I tell you to share your examples with the group. • Then we will bring it up as a class.

  6. Calculating Work • Work as stated is a force through a distance. • W=Fxd • The units for work are the joule. • Nxm= J • Unit for all types of Energy

  7. Sample Problem • 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?

  8. Practice • Page 379 p. 1-5

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