View Full Version : penduluum staircase

03-20-2012, 02:30 PM
This is the staircase at a local science museum (in Philly), there is a large penduluum hanging from the ceiling all the way to the basement, and each day, staff at the museum reset all the pins at the bottom, and start the penduluum swinging for the day....
http://farm8.staticflickr.com/7022/6687303625_fa9fba4982_z.jpg (http://www.flickr.com/photos/justinryansr/6687303625/)
Image (http://www.flickr.com/photos/justinryansr/6687303625/) by Justin Ryan sr (http://www.flickr.com/people/justinryansr/), on Flickr