lifting points around center of gravity of semi circle?

Question

say you have got a semi circle, and have calulated where the center of gravity is. i now want to find 3 points where it can be lifted, keeping the semi cirlce flat. how do i find these?

Answer 1

Divide the semicircle into 3 segments of 60°. Lift at the centers of gravity of the sectors.
For each sector Rc = 2Rsin(π/6)/(3π/6) = 2R/π along the bisector of the sector central angle.
With the origin at the center of the semicircle, the polar co-ordinates of the centroids are
2R/π @ 30°
2R/π @ 90°
2R/π @ 150°
Lifting with 1/3 the weight at each of these points will provide uniform lift without tipping. You can also cable from these points to a point directly above the c.g. of the semicircle, but only two of the cables will be the same length. The one from the center sector will necessarily be shorter, but your forces will balance, and you'll have uniform lift.

Answer 2

Center Of Gravity Semicircle

Answer 3

i do no longer see why somebody could choose their floor to be hexagonal formed that's weird and wonderful. flooring are in lots of cases oblong and sq.. yet anyhow, in case you have 2 semi around aspects on the two aspects then there is areas left in the two aspects of the floor because of the fact the diameter could no longer adhere with the aspects of hexagon because of the fact hexagon is concave. additionally, what do you advise via the middle factor of semi circle whilst semi circle isn't an entire circle so which you will no longer have "middle" evaluate semi circle because of the fact in case you do no longer understand the middle factor, that's equidistant from all the different factors. there is no middle evaluate semi circle it somewhat is equidistant from all the different factors. the architect could have long previous loopy to no longer understand there is no middle evaluate semi circle. yet whilst he sees one he could be weirdo yet anyhow, if he sees one then he could be extra weirdo to no longer degree properly how lots floor section is critical to conceal the carpet. on your 2d question i'm able to no longer worry analyzing because of the fact your first question is lame.