CK-12 Physical Science Concepts - For Middle School

(Marvins-Underground-K-12) #1

http://www.ck12.org Chapter 4. Motion and Forces


FIGURE 4.77


FIGURE 4.78


Simple and Compound Machines


There are six types of simple machines that are the basis of all other machines. They are the inclined plane, lever,
wedge, screw, pulley, and wheel and axle. The six types are pictured in theFigure4.79. You’ve probably used

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