XPost: alt.home.repair, alt.sci.physics, uk.d-i-y   
   From: shy543@gmail.com   
      
   "Commander Kinsey"  wrote in message   
   news:op.zv457rk6wdg98l@desktop-ga2mpl8.lan...   
   > On Thu, 24 Jan 2019 21:26:37 -0000, Steven  wrote:   
   >   
   >>   
   >>   
   >> "Commander Kinsey"  wrote in message   
   >> news:op.zv43lzx3wdg98l@desktop-ga2mpl8.lan...   
   >>> On Thu, 24 Jan 2019 20:43:14 -0000, Steven  wrote:   
   >>>   
   >>>>   
   >>>>   
   >>>> "Commander Kinsey"  wrote in message   
   >>>> news:op.zv40t1vfwdg98l@desktop-ga2mpl8.lan...   
   >>>>   
   >>>>> I tried one, once, I couldn't stay on it.  I see countless Youtube   
   >>>>> videos   
   >>>>> of people falling off them.  But why?  If you are about to fall over   
   >>>>> backwards, shouldn't it feel the tilt of your feet and simply roll   
   >>>>> under   
   >>>>> your centre of gravity?   
   >>>>   
   >>>> Not possible with your feet still on it.   
   >>>   
   >>> What isn't possible?  It moving under you or you falling off it?   
   >>   
   >> "simply roll under your centre of gravity" while ever your feet are still   
   >> on   
   >> it.   
   >   
   > Why would that not be possible?   
      
   When say it decides you are falling backwards, and moves back,   
   while you are standing on it, the complete assembly of you and   
   the scooter moves back and it doesn't change where it is relative   
   to the person's center of gravity.   
      
   > Let's say you're stood stationary and upright on it, not moving.  Now, you   
   > lose your balance a little and begin to fall over backwards.  Your feet   
   > tilt backwards, the device senses this, and moves backwards.  You're now   
   > still over the device   
      
   Yes, but it can't move under the center of gravity while your feet are still   
   on it.   
      
   > and don't fall off it.   
      
   The scooter moving backwards has done nothing to stop you falling backwards.   
      
   > The more you tilt over, the faster it goes, moving your feet so they're   
   > under your centre of gravity,   
      
   That doesn't happen.   
      
   > thus you don't fall.   
      
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