ID-0010 Invest in You - Children's Physics & Engineering Concept Coloring Activity
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Parent: Can you color this page?
Child: What is it about?
Parent: You can push a cart full of groceries on a market floor with little or no effort. The same groceries are much harder to hold on to when held in your hands.
Child: Sure. I understand.
Parent: Horizontally, you are doing work against rolling friction which is nothing. Vertically, you are fighting acceleration due to gravity which never takes a vacation!