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Unit D: Mechanical Systems

Class Notes

Topic 1 - Levers and Inclined Planes
File Size: 523 kb
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Topic 2 - The Wheel and Axle, Gears and Pulleys
File Size: 422 kb
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Topic 3 - Energy, Friction and Efficiency
File Size: 301 kb
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Textbook:

Unit D - Mechanical Systems
File Size: 9559 kb
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Assigned Practice:

Topic 1 - Page 284 #'s 1-6

Topic 2 - Page 295 #'s 1-3

Topic 3 - Page 302 #'s 1-3

Topics 1-3 Review - Page 303 #'s 1-20




​Topics 1-3 Review - ANSWER KEY

1. joule
2. sprocket
3. lever
4. fulcrum
5. winch
6. driver
7. kinetic
8. work
9. pulley
10. gear
11. efficiency
12. arm
13. Class 3

14. A Class 3 lever has a mechanical advantage that is less than 1. An example of a Class 3 lever is a hockey stick.

15. It is more practical to use a wheel and axle rather than a lever to steer a car, control the volume on a radio, or open a door (using a doorknob).

16. The handle is the effort arm, and the axle the handle turns is the load arm. A winch is like using a Class 1 lever over and over again.

17. See picture below.

18. All of the responses describe something that machines do.

19. A simple machine can make work easier by reducing the amount of effort force required to life a load, by changing the direction of the effort force, or by reducing the distance over which the effort force must act.

20. In order to gain a mechanical advantage, the effort force must act over a larger distance for a longer period of time.

Picture

Topic 7 - Machines Throughout History - Page 341 #'s 1-5
File Size: 193 kb
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Topic 8 - People and Machines - Page 350 #'s 1-5
File Size: 82 kb
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Topics 7/8 Review - Page 351 #'s 1-11, 13, 15, 16
File Size: 103 kb
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