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Summary of Contents for Eisco WDMS18
- Page 1 SIMPLE MACHINES : LEVER CAT NO. WDMS18 Experiment Guide...
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Page 2: General Background
The arrangement of the effort, load and fulcrum determines the “class” of levers. There are three classes of levers. In first class levers as shown in diagram 1: · the fulcrum is positioned between the effort and the load · the effort is smaller than the load © EISCO SCIENTIFIC www.eiscosci.com... - Page 3 · the effort is greater than the load · the load moves further than the effort · the lever can be considered a distance magnifier Load Effort Fulcrum Diagram 3 © EISCO SCIENTIFIC www.eiscosci.com...
- Page 4 Inclined planes also increase mechanical advantage by increasing the distance traveled and decreasing the amount of force applied. Examples of inclined planes include ramps, hills, ladders, stairs and the backs of dump trucks. © EISCO SCIENTIFIC www.eiscosci.com...
- Page 5 Diagram 4 REQUIRED COMPONENTS (INCLUDED) Name of Part Quantity Lever Fulcrum on a base REQUIRED COMPONENTS (NOT INCLUDED) Name of Part Quantity Heavy objects such as text books Picture of levers from photos or magazines © EISCO SCIENTIFIC www.eiscosci.com...
- Page 6 The object that is being lifted is called the load. Identify and label the load in diagram The force being applied to move the object is called the effort. In diagram 5, label object applying the effort with the word “effort”. © EISCO SCIENTIFIC www.eiscosci.com...
- Page 7 A notch placed here would allow us to move the fulcrum and make the distance between the fulcrum and the hand greater, therefore requiring less force to lift the book.) © EISCO SCIENTIFIC www.eiscosci.com...
- Page 8 (in this case the fulcrum.) This helps explain why we are able to do the same amount of work with less force using a lever. Look at the lever in diagram 6 which shows the lever set up so it is easiest to do work. © EISCO SCIENTIFIC www.eiscosci.com...
- Page 9 13. Draw in a fourth notch on diagram 6 showing where you would place a notch to make your work even easier to do. Explain why you would put your notch there in terms force and distance. _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ © EISCO SCIENTIFIC www.eiscosci.com...
- Page 10 You may want to discuss different classes of levers, and how the arrangement of the load, effort and fulcrum determine what class lever is being used in each situation.) © EISCO SCIENTIFIC www.eiscosci.com...
- Page 11 · the effort is greater than the load · the load moves further than the effort · the lever can be considered distance magnifier Load Effort Fulcrum Diagram 3 -10- © EISCO SCIENTIFIC www.eiscosci.com...
- Page 12 Determine if the lever is a first, second or third class lever. -11- Manufactured by : U.S. Distributor : Eisco Scientific 850 St Paul St, Suite 15, Rochester, NY 14605 Email : www.eiscosci.com www.eiscolabs.com EISCO SCIENTIFIC instructions, content and design is intellectual property of EISCO...
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