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Do Now

Do Now. Take sheet from back table Answer questions from worksheet using textbook. What Is Work?. by Anthony Rohm. Hmm… I think that she is working right now. She sure is using a lot of force. What is Work?. Force exerted on an object that causes it to move. No work without motion!.

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Do Now

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  1. Do Now • Take sheet from back table • Answer questions from worksheet using textbook

  2. What Is Work? by Anthony Rohm

  3. Hmm… I think that she is working right now. She sure is using a lot of force.

  4. What is Work? • Force exerted on an object that causes it to move.

  5. No work without motion! • In order for you to do work on an object • the object must move some distance as a result of your force.

  6. Only force in the same Direction • In order to do work on an object, • the force you exert must be in the same direction as the object’s motion.

  7. Work or not work? Force Motion

  8. Force Motion

  9. Force Motion

  10. Part of force that does not do work Total force Part of total force that pulls sled

  11. Calculating Work • Work = Force x Distance • Units are Joules (J)

  12. Calculating Work • To help arrange furniture in your classroom, you exert a force of 20 N to push a desk 10 m. How much work do you do?

  13. Force Motion 0 degree angle

  14. .25 of force that does not do work Total force 75 degree angle .75 of total force that pulls books

  15. Force Motion 90 degree angle

  16. Will you do more work when you move five books or two of them the same distance? Force Motion 0 degree angle

  17. How will a rough surface affect the amount of work done? Force Motion 0 degree angle

  18. How will dowels affect the amount of work done? Force Motion 0 degree angle

  19. An A R Production

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