http://www.youtube.com/watch?v=EZF01JCm-sI&feature=related
im not sure why but this surprised me a tad
seems almost illogical, same starting height and same ending point, one has way more speed (less time) and covers a further distance vertically and laterally, and appears to have more momentum as well
could this be used as an offset timing mechanism in a gravity type design perhaps?
just thought id share...
http://www.youtube.com/watch?v=VhOiXCRQu0A
G.
@Groundloop;
I gotta think about that one. Especially in relation to magnets.
HMMMM...
:S:MarkSCoffman
Hi Groundloop
Certainly looks counter intuitive,I suppose we can assume the balls are the same mass?
Haven't seen that before. It looks like it picking up velocity from the first steep valley and the second is slightly lower valley. If we combine the two we should have steep edges going into a gentle sloping bowl. The idea that popped into my head was to create an energy well where the ball seems to be constantly seeing a slope that is smooth in the middle but steep towards the edges. Two springs could control slope of the bowl from the weight of the ball as it rolls toward the steep edge it force the other spring to pull back causing the ball to see a slope in that direction.
Here's a picture to make it easier to understand. Friction would kill it eventually unless some magnet system could be used to push it back as it tips. I can't build or test it for another two months due to an accident and surgery, I severed the tendon in my thumb which is not fun. Maybe someone can add better ideas to it.
yes, they are assumed to be the same mass and size
thats what perplexed me, for i feel as if ive seen a single slope example where the ball reaches at the same time with the same momentum....
I suspect that how the mass is distributed within the radius
of the object has some effect on how much faster the one
course is run. The biggest difference probably occurs when
the object is a thin shell, like the cellulose ping-pong ball.
There is a large percentage of the mass of rotational momentum
as a fraction of forward momentum. A smaller difference
would probably occur if the objects were solid ball bearings
with a larger percentage of forward momentum to rotational
momentum. I doubt there is any difference based on absolute
weight or density, but on how that mass is distributed in terms
of the radius rotation.
So our surprise at the velocity difference is probably due to
the thin shelled nature of ping pong balls.
:S:MarkSCoffman