Onyma Report This Comment
Date: May 17, 2012 02:09AM

Cool idea but I wonder really how much cable is inside that spool. I can't imagine much more than say 3 floors... 4 tops.

woberto Report This Comment
Date: May 17, 2012 02:33AM

Mythbysters debunked these batman toys.
If you weigh 30 pounds, yes you can build one.

fossil_digger Report This Comment
Date: May 17, 2012 02:58AM

yeah the mythbusters are experts.

woberto Report This Comment
Date: May 17, 2012 09:30AM

Since the tension force, T, is in the same direction as the displacement, h, we know that the work done is equal to hT.
We know that the sum of forces acting on m is T – mg which is equal to ma.
Therefore, T = m(g – a).

quasi Report This Comment
Date: May 17, 2012 12:49PM

And if you actually do make it safely to the ground you can belt out, "We are the champions, my friend!"

Onyma Report This Comment
Date: May 18, 2012 09:48PM

Yeah, what is up with the use of Mercury in the pic?

Dingo Report This Comment
Date: July 08, 2012 09:53AM

It would work fine at most any length, just put the wire in the wall unit, not in the hand unit.