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Learners set up books with rubber bands stretched between the books. When two identical books are stretched apart and released, they move back toward each other an equal distance.

1 cent - $1 per group Ages 11 - 14 30 to 45 minutes
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In this lab activity, learners act as fellow scientists and colleagues of Isaac Newton. He has asked them to independently test his ideas on the nature of motion, in particular his 2nd Law.

$10 - $20 per group Ages 14 - 18 45 to 60 minutes