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A Pendulum In Space: Kids Learn It Ain't the Same

NASA has posted new videos of International Space Station

astronauts doing experiments proposed by schoolkids

, and it includes this easy-to-grasp one.

Everyone knows how a pendulum acts on Earth. How about in zero gravity? Astronaut Cady Coleman -- who shows again why she made our list of Seven Wildest Astronaut Hair Photos -- demonstrates, via the use of a pencil and some dental floss.

A pendulum will act differently, she says, "and it's going to be because of good old Mr. Newton and his first law of motion, that an object when set in motion is going to stay in motion until it meets another force."

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