Thanks everyone for the quick responses.:-)
Originally I thought that one end of each of the three spings tied together
at the center, and I got the answer (A): 2mω^2, whcih was not (C):2/3mω^2.
I had been checking what mistake I made on principle/formula/calculation,
but couldn't find...
Thanks Delphi51. Now I understand it completely.
I didn't picture it correctly before: for each spring, one end is tied to the
center of the triangle, and a point mass m is tied to the other end.
Homework Statement
24. Three point masses m are attached together by identical springs. When placed at rest on a horizontal surface the
masses form a triangle with side length l. When the assembly is rotated about its center at angular velocity ω, the
masses form a triangle with side...