I only studied Physics in high school and college. I didn't master it. This Bumble don't bounce and I am allergic to gravity my friend. Better to find a younger set of knees that can actually climb a straight ladder and I will keep my engineering comments to myself.
Dang it, you offered to help and I though I might get out of a few trips up the ladder this fall. I'm sure that when I start dismantling the thing this fall I'll have forgotten some tool or multiple tools that I'll need because nothing ever works as planned and I'll have to make more than one trip up and down the ladder. At least it's easy to get the thing down. Disconnect the water and wiring, lift it off the duct, and throw it off the roof.
The one and only time I fell off a ladder I didn't bounce either and it took months to get back to being my fiesty self. That was over twenty years ago and it was only a 4' step ladder and no, I wasn't on the top step.
I was hanging Christmas lights on the gutters from the roof over the 2nd story. Peering over the edge where the house pad was elevated some 6-feet above water level in the pond it looked (and felt) every bit of the 30+ feet to the ground. I could feel gravity pulling me off of that roof. Right then I QUIT. Never again on a roof...except when it started to leak and that's another #$%&^! story. I would be very glad to hand you tools, assist in ways that don't require ladder or roof work, and duck when the swamp cooler is ejected from the roof, with PREJUDICE.
Ha, I was putting lights on our front yard Christmas tree, a blue spruce, when I took my fall. Conclusion: Putting up Christmas lights is dangerous work. That little shenaggin finished my outside Christmas light hanging.