A) must lie at O
B) must lie left of O
C) must lie right of O
D) Could lie anywhere inside the cube
Correct Answer: D
Solution :
Idea This question is based on the concept of centre of mass. Here, one has to remember that the centre of mass of a system with uniform mass density lie at their geometrical centre but if the mass density is non-uniform then centre of mass will not lie at geometrical centre. Here there is no relation given between the densities of spherical ball and cube, so the centre of mass of the two could lie anywhere inside the cube. TEST Edge Different questions where one has to find out the centre of mass of a system could also be asked.
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