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What is a machine called that uses two or more simple machines?

What is a machine called that uses two or more simple machines?. Compound machine. What class of lever is a pair of scissors?. 1 st class Resistance - fulcrum - effort. What class of lever is a fishing pole?. 3rd class Fulcrum – effort - resistance. What class of lever is a nutcracker?.

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What is a machine called that uses two or more simple machines?

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  1. What is a machine called that uses two or more simple machines? Compound machine

  2. What class of lever is a pair of scissors? 1st class Resistance - fulcrum - effort

  3. What class of lever is a fishing pole? 3rd class Fulcrum – effort - resistance

  4. What class of lever is a nutcracker? 2nd class Fulcrum – resistance - effort

  5. What class of lever is a pair of pliers? 1st class Resistance – fulcrum - effort

  6. Define Actual Mechanical Advantage Mechanical advantage is the number of times a machine multiples the effort force

  7. How do you determine the mechanical advantage of a pulley system? Count the number of supporting strands or pulleys

  8. What are the 2 types of mechanical advantage? Ideal Actual

  9. What is the mechanical advantage of a fixed pulley? 1. There is no advantage. A fixed pulley only changes direction

  10. Give an example of a compound machine car

  11. Name the 6 simple machines Wedge Screw Inclined plane Pulley Wheel and axle Lever

  12. What is the force applied by a machine called? Load force

  13. What is another name for an inclined plane wrapped around a cylinder? screw

  14. What is another name for 2 inclined planes put together? wedge

  15. What causes simple machines to become inefficient? friction

  16. When calculating IMA, what is being measured? Distance: effort & load

  17. When calculating AMA, what is being measured? Force: effort & load

  18. What is the work done without the use of a machine called? Output work

  19. What is the work you do on a machine called? Input work

  20. How is input work calculated? Effort force multiplied by effort distance

  21. The output work of a machine is 2700 joules and the input work of the machine is 5400 joulesWhat is the efficiency of this machine? Eff= ow / iw 2700 / 5400 = 50 percent

  22. 105 newtons 5 meters 120 newtons 3 meters What is the load distance? 3 meters

  23. 105 newtons 5 meters 120 newtons 3 meters What is the effort force? 105 newtons

  24. 105 newtons 5 meters 120 newtons 3 meters What is the output work? 120 X 3 = 360 joules

  25. 105 newtons 5 meters 120 newtons 3 meters What is the input work? 105 x 5 = 525 joules

  26. 105 newtons 5 meters 120 newtons 3 meters What is the efficiency? 360 / 525 = 69%

  27. 105 newtons 5 meters 120 newtons 3 meters What is the IMA? Ed / Ld 5 / 3 = 1.67

  28. 105 newtons 5 meters 120 newtons 3 meters What is the AMA? Lf / Ef 120 / 105 = 1.14

  29. 105 newtons 5 meters 120 newtons 3 meters By using this inclined plane, how much moreworkwill be needed to lift this load? (IW - OW) 525 - 360 = 165 joules

  30. 105 newtons 5 meters 120 newtons 3 meters If it takes more work to use this inclined plane, then why use it? It’s easier (requires less force) to use although you need to travel a longer distance.

  31. 105 newtons 5 meters 120 newtons 3 meters What is the slope? a² + b² = c² 3² + ? = 5² ? = 4 (run) 3 / 4 = .75 (slope)

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