Two wooden plank in a door frame.

[ValeryOchkov]

One Problem from PlanetPTC user:

Two wooden plank (200 and 210 cm) be leaned between the two side of a door frame, each one diagonal from the lower corner of one side to the opposite side...

Unable to play video. Please try again later.

[Werner_E]

Any idea what family of curves we are seeing here?

Of course there is a difference depending on which side the longer plank is (click the image to animate):

[ValeryOchkov]

It is some Mathcad-card-game

Now we can "showing our cards" (to bluff).

My solution:

And what are your "cards"?

[Werner_E]

No, it sure isn't a game at all, but if you really are interested, here is a screenshot of how I did it. Nevertheless thats the trivial part of the task. The interesting part is to find a closed form of the curve equation or at least be able to determine the class of curves it belongs to. I have no solution to this part so far.

And if you like thos flash videos more, here you are:

http://communities.ptc.com/videos/5079

http://communities.ptc.com/videos/5080