Question
In which of following cases, there is matter at centre of mass:
(i) Uniform solid sphere
(ii) Hollow sphere
(iii) Ring
(iv) Uniform annular disc
(v) Disc
(vi) Solid cube?
Solution
In uniform solid sphere, disc and solid cube there is matter at the centre of mass, while there is no matter at centre of mass in hollow sphere, ring and annular disc.
