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Simple Lever Experiments

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					Simple Lever Experiments


1. Brick, pencil, ruler
                                              Brick
                                              Ruler

FINGER                                        Pencil
PUSHES
HERE


Place a pencil under a ruler and a brick at the end of the ruler
Use your finger to push the one side of the ruler down.
Now move the pencil – closer to your finger or closer to the brick.
Which is harder to move?

2 String, ruler weights
Place the string in the middle of the ruler to hang the ruler off.
Now hang two weights equidistant from the fulcrum.
Now move one weight closer of further – what happens?
(More able children can identify that when distance from fulcrum x weight on
both sides is equal then the balance will be equal.

				
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posted:2/25/2010
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