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Product #: SED10573_TQScience Readers: Physical Science: Investigating Force and Motion (Resource B eBookGrade 4|Grade 5|Grade 6|Grade 7|Grade 8Sale! Ships Free!
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Forces can't be seen, but without them, nothing around us would happen! A force is a push or pull that usually causes movement. Friction is a force that opposes motion and slows things down or stops them. Famous scientist and mathematician Sir Isaac Newton wrote the rules about forces and motion.
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