Friday, February 28, 2014

How do you change the motion of a pendulum? (Scenes from Science)

by Ava:

First we watched to see how long our pendulum would swing back and forth in one minute.  It slowed down very quickly but it swung 23 times in a minute.

Second we tried starting the pendulum farther from the middle and we observed that it swung about the same amount.

Then we tried making the pendulum heavier by adding a weight into it.  We observed that it still swung the same number of times, but it swung longer.

Afterwards we shortened the string and realized that it swung 31 times in a minute.  Finally we put weights in the short pendulum and it swung the same time.  We concluded the shorter the string the faster it swings.