Inclined Plane 


Inclined Plane:
    An inclined plane is a simple machine.  It is a flat surface that is higher on one end.  You can use this machine to move an object to a lower or higher place.  Inclined planes make the work of moving things easier.  You would need less energy and force to move objects with an inclined plane. 

Examples of Inclined Planes:


Try this experiment!

    Large books, ruler, one cup of rice inside a small plastic sandwich bag
        (closed with a twist tie), rubber band strip tied to the top of the bag
    Stack the books in one pile.  Lean one book against the other to create an inclined plane.  Place the bag of rice on the table.  While holding the end of the rubber band, lift the bag of rice straight up to the top of your book stack.  Use the ruler to measure the length of the rubber band.  Now put the bag of rice at the bottom of the inclined plane and drag it to the top of the stack of books by pulling on the rubber band.  When it is almost to the top, measure the length of the rubber band.
Things to think about during this experiment:
-What simple machine reduces the length of the rubber band in this                 experiment?
-Why was the rubber band more stretched when the bag was lifted straight up into the air?
-What other inclined planes could be used in an experiment like this?
Conclusion: (Read this after you try the experiment.)
    It took more work to move the bag of rice straight up into the air.  This is why the rubber band was stretched farther.  It takes less force to move the bag of rice up the inclined plane. return

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