2017年9月 – art of soul

重心

http://www.crane-club.com/study/dynamics/gravity.html

https://note.chiebukuro.yahoo.co.jp/detail/n158812

https://www.palmie.jp/lessons/74
https://wakariyasuku.info/%E5%8A%9B%E3%81%A8%E3%81%9D%E3%81%AE%E5%88%A9%E7%94%A8/%E7%89%A9%E3%81%AE%E9%87%8D%E5%BF%83%E3%81%A8%E3%81%AF%EF%BC%9F%E3%80%80%E9%87%8D%E5%BF%83%E3%81%AE%E3%82%82%E3%81%A8%E3%82%81%E6%96%B9%E3%81%A8%E3%81%AF%EF%BC%9F/

http://www.crane-club.com/study/dynamics/gravity.html

http://itami-setumeisho.com/archives/963

http://www.rikasuki.jp/rika_no94/rika_no94.htm

https://books.google.co.jp/books?id=UXWKAAAAQBAJ&pg=PA130&lpg=PA130&dq=%E9%87%8D%E5%BF%83%E4%BD%8D%E7%BD%AE&source=bl&ots=HmCWvvD4aw&sig=Msg8qoZ9xexDnqgZSrI-Eo5geDs&hl=en&sa=X&ved=0ahUKEwic5q_omqjWAhWKVLwKHY0qAh84ChDoAQhaMAc#v=onepage&q=%E9%87%8D%E5%BF%83%E4%BD%8D%E7%BD%AE&f=false

http://www.oekaki-hoho-ron.com/center-of-gravity-of-human-body-sketch/

http://izumi-math.jp/F_Nakamura/heso/heso3.htm

https://www.youtube.com/watch?v=7PLiBD5XcEI

https://www.youtube.com/watch?v=NUeLA0flsfg