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Unit 1: Mechanics Page 20
friction between two objects where Understanding friction is very
at least one of them is moving. important in making engines and
Friction happens due to the machines run more efficiently and
electro-magnetic forces between safely. There are many mysteries
two objects. Friction is not and discoveries to be uncovered
necessarily due to the roughness of with this concept. Go out and make
the objects but rather to chemical some!
bonds "sticking and slipping" over
one another.
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