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Gentlemen and ladies of this fine list,
 
 
I know I am taking you California engineers away from the election this evening, but I need to ask a question that I am not too familiar with.  I have a situation where a 6200# log is moving along a support driven by chains.  The log will contact a stop mechanism which is supposed to stop the log.  The log will be moving at 200 ft/min.  I need to calculate the force on the stop.  Can you give me any help or send me to a reference that I hope I have that may explain what I need to do.  I have been looking at a 25 year old dynamics book from college, but to be honest it isn't helping me very much.  It is a little late this evening, but I need to get going on it in the morning.  I can scratch out some numbers which I think will be pretty conservative, but would like some other input if I can get it.  The stop mechanism needs to be designed after the force is determined.
 
Thanks,
Joseph R. Grill