Something strange about new york city subways

  • #1

Main Question or Discussion Point

I've always noticed something strange about new york city subways. When they start to slow down, you feel a force pushing you forward, which seems fine. However, the subway car actually stops, you feel a jerk backward at that moment. Is there an explanation for this?
 

Answers and Replies

  • #2
russ_watters
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The concept is, in fact, called "jerk": http://en.wikipedia.org/wiki/Jerk_(physics [Broken])

Since you are leaning backwards you just about fall over since the rate of change of acceleration is faster than you can react to.
 
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