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A gear is really made up of another type of simple machine, but is just given teeth. Which one?
Wheel & Axle.
True or false: A fixed pulley only changes the direction of pull, and doesn't make the item seem lighter.
True.
Simple machines make life harder. True or false?
False.
If I have 3 gears lined up, and spin the driver gear to the left, which direction is the last gear going to spin?
Left.
What is a series of gears working together called?
A train