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Non-linear Power Point

Non-linear Power Point. 7 th Grade Super Review By: Ms. Stipa. Work and Simple Machines Review. This is a short review to test your mind. Do you know what it means to do work? Can you identify simple machines and their uses?

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Non-linear Power Point

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  1. Non-linear Power Point 7th Grade Super Review By: Ms. Stipa

  2. Work and Simple Machines Review This is a short review to test your mind. Do you know what it means to do work? Can you identify simple machines and their uses? For each question, select the best answer. Follow the onscreen directions and navigation buttons to make your way through the questions.

  3. Question 1 A). Spending all day to writing a report. B)Leaning against the wall. C)Holding two books for ten seconds. D) Raising and lowering a light object three times. Which is an example of work?

  4. Oops! That’s okay. Go back and try again 

  5. You’re a smartie pants!

  6. Question 2 • Be at a constant velocity in the direction of the force. • Accelerate at 9.8 m/s2. • Be exerted in the same direction as the object’s motion. • Move some distance. In order to do work on an object, such as pulling a sled, the force must:

  7. Oops! That’s okay. Go back and try again 

  8. You’re a smartie pants!

  9. Question 3 • Yes. A force is a force, no matter what direction it moves. So, you always do work. • No. Force must cause motion that is in the same direction as the force. • Yes. The force is within us all… Now, where did I leave my lightsaber…? • No. You only do work when the force moves the object forward. If you exert a force, do you always do work?

  10. Oops! That’s okay. Go back and try again 

  11. You’re a smartie pants!

  12. Question 4 • Machines alter the force the pulls objects toward each other (gravity). B) Machines change the amount of input force required, the input distance required, and/or the direction of a force. C)Machines overcome friction. How do machines make work easier if they do not decrease the amount of work you need to do?

  13. Oops! That’s okay. Go back and try again 

  14. You’re a smartie pants!

  15. Question 5 • Multiplying input force • Adjusting gravity to make the object lighter. • Increasing output distance • Changing the direction of the input force. Which is not an example of how a machine can make work easier?

  16. Oops! That’s okay. Go back and try again 

  17. You’re a smartie pants!

  18. Question 6 A)A wheel. B)A doorknob. C)A flashlight. D)A car. Which isan example of a simple machine?

  19. Oops! That’s okay. Go back and try again 

  20. You’re a smartie pants!

  21. Question 7 • An inclined plane going up the stairs? • A lever to raise it up. • A pulley system. • A wedge. To lift a heavy box to the second floor of our school and through a window, would you use:

  22. Oops! That’s okay. Go back and try again 

  23. You’re a smartie pants!

  24. References Science Explorer: Motion, forces, and energy. Teacher’s Edition (2002). Needham, MA: Prentice Hall.

  25. Template Provided By www.animationfactory.com 500,000 Downloadable PowerPoint Templates, Animated Clip Art, Backgrounds and Videos

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