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Unread 05-01-2015, 11:56
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Deucalion Deucalion is offline
Math Addict
AKA: Gabe
FRC #4531 (STEMpunk)
Team Role: Leadership
 
Join Date: Jan 2015
Rookie Year: 2013
Location: Wisconsin, USA
Posts: 4
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Re: Picking Up Upside-down Totes?

Quote:
Originally Posted by Steven Smith View Post
Thanks for testing and making your first post to Chief Delphi a good one

Could you describe how you measured the 6 pounds of force?
Honestly, it was a complete guess and the although I did actually run the "experiments" 3 different ways 10-12 times, the entire post was laden with dry humor and mild sarcasm. Really, that was just what it felt like to me as I picked them up and set them down, BUT I did go and check the friction coefficient between skin and plastic, and it looks to be ~0.98 as described here -> http://hypertextbook.com/facts/2005/skin.shtml for dry skin. Given this and the weight of the totes at 7.8 pounds you can deduce that to grip the sides with dry hands you would need about 7.9 pounds of contact pressure, maybe a bit less with sweaty hands, so I wasn't too far off the first time when I said "no less than 6 pounds"!

Last edited by Deucalion : 05-01-2015 at 12:06. Reason: grammar error