2) Attach an 8" chain to the end of it.
Now, when you want to know how fast something is rolling down a slope, you just put the base on the incline, then measure the distance between the pole and the end of the chain. That is how far the thing moves because of gravity. Wow!
EDIT: I KNOW WHEN I'VE BEEN BEAT.
Rody wrote:IVhorseman wrote:You can also calculate the same distance by taking 8cos(angle)"! Hooray for too much physics!
wrong, the diagram shows what you get if you calculate 8tan(angle)
this is why I find his way to be wrong.
I'll post a picture of what I meant later.
EDIT: which is now.
as you can see this method DOES give you the 8sin(angle) which is the component of gravity we're interested in seeing.
even so, HIS method is a nice approximation, but only correct if the angle is really small.