Cool Science – 11/05/2012: Pendulums

By Scott Sarvay

November 5, 2012 Updated Nov 4, 2012 at 2:51 PM EDT

FORT WAYNE, Ind. (Indiana’s NewsCenter) - In this week's episode of Cool Science Monday, Martin Fisher from Science Central talks about pendulums.

They’re fixed at the top, and free-moving at the bottom. The bottom weight of the loose part is the bob. When a pendulum swings back-and-forth, gravity pulls the bob down. As it passes through air, friction with the air (air resistance) causes the pendulum to move slower and eventually stop swinging. I showed a way to make a pendulum with a string, a heavy washer and a light washer. By combining the dropping factor and the swinging factor, this experiment produces a surprising motion.

Watch the video to find out what happens.




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