12/11 Following up:
I just did this problem last week again for fun.
\_ for fun? you must be really
great at a party or out on
a date!
My wife thinks I'm a pretty good date _/
thank you very much, and hers is really the only opinion that
counts on the matter. Yes, I read the Feynman lectures in my
spare time. So what?
\_ So who is she dating? What's her id on the casual
encounters board at craig'slist? I've got 2 bucks.
\_ CE is so yesterday on CL. Go for Erotic Services.
Turns out the max force (when the last bit of the
chain hits the scale) is twice the weight. I've
verified this experimentally. The weight v. time
is: f(t) = (m/l)*(gt)^2
m = mass, l=length, g = gravity
\_ what did you do "experimentally"?
--psb
\_ what did you do "experimentally"? --psb
\_ I took a chain of non-negligible mass, and watched it as it hit
the scale. The maximum force reached twice the weight of the
chain when it was done (and of course rapidly went to zero
\_ Also, interesting followup to the ladder-against-the-wall: what is
the final horizonatal velocity of the ladder? What if the wall
weren't there?
afterwards).
\_ Also, interesting followup to the ladder-against-the-wall: what
is the final horizonatal velocity of the ladder? What if the
wall weren't there? |