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The Real-World Science Supplement
to Scholastic News.
how fast an object moves over time
Sled dogs can gain more speed if a sled is light.
a blend of materials that makes a new material
Some hockey sticks are made of a composite of carbon and other materials.
the push or pull on an object
Sled dogs pull against their harnesses with force to move a sled forward.
resistance to movement when two surfaces rub together
Friction is what stops a ball from rolling across rough grass.