Sliding floor pull up variation using kettlebells (or more) for those on carpet

[knitter_mom]

I might give that physics problem to my boys this week (I homeschool and we are doing physics and chemistry this summer): how much actual "weight" are you pulling when you drag 132 pounds across the floor? And the related problem of whether or not the weight being in a smaller surface area that contacts the floor has the same friction force as same weight with larger surface area (i.e., does a heavier weight per unit area create more friction?).

Sorry, we've been physics crazy lately around here! Really though, I love this idea of horizontal pull-ups, I can't do full vertical ones here at home (no equipment and no way to gradually work up to it), so this is very cool, thanks.

Kris