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Popular Science’s Adam Weiner points out this entertaining example of Newton’s First Law of Motion, “a body continues to maintain its state of rest or of uniform motion unless acted upon by an external unbalanced force”. In this case, meaning those carts wanted to stay where they were.

becky stern headshot Science can be fun!

Becky Stern

Becky Stern is director of wearable electronics at Adafruit Industries. Her personal site:

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