Attach a c-clamp at one end of the meter stick. Redo the demonstration. Your fingers will still meet under the center of mass.
The center of mass of a train would be in the center of the train.
This is assuming all the riders are of the same mass. The feeling a
track is designed for is engineered around the center of mass of a
train. A rider gets a different feeling if she is to ride some
distance away from the center of mass.
This can be demonstrated by using the HotWheels train. (Click here to go to the construction of the HotWheels train.) Set up a box with a track running horizontally over the top. Slowly roll the train over the hill. As the front of the train begins to pass over the hill it will not speed up until the middle, center of mass of the train, travels over the hill.
If you use or find this page useful or have any comments, please contact the author so maybe he'll do more. Author: Tony Wayne
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