5 Sep
2011
5 Sep
'11
3:40 p.m.
Chris Lahey wrote:
I got the same 20 lbs in my calculations, but I don't think you get to
double it. If I'm the gent, my hand is putting 20 lbs of force on the
ladies back. At the same time, her back is putting 20 lbs of force on my
hand. When we carry a 20 lb object, we're pulling up with 20 lbs of force
and it's pulling down with 20 lbs of force, but we don't call it 40 lbs of
force.
Sure. The doubling comes from 20lbf per person. It takes 20lbf to
hold me in, and 20lbf to hold them in, so between us we need 40lbf to
stay together.
There's also the fact that despite some of the radial acceleration
coming from centripital force, I suspect some of it comes from the
feet.
That might be important. I'm not sure how to measure that.
If someone wants to bring a bathroom or similar scale to the concord
scout house tonight, I would be curious to measure this.
Jeff