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Have you ever used a can opener? A can opener uses force
to open a can. Look at a handheld can opener.
You have to put the blade on top of the can. Then you
have to use force to squeeze the blade into the can. After that, you have
to use force to turn the wheel. The wheel moves the blade and cuts open
the can. The can opener will not work by itself. You have to use force
to make the can open.
Force causes change.
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A can opener needs force to open a can.
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