| A segment of angle \[\theta \] is cut from a half disc with symmetry of symmetrically as shown. If the centre of mass of the remaining. part is at a distance 'a' from O and the centre of mass of the original disc was at distance d then it can be definitely said that |
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A) \[a=d\]
B) a > d
C) a < d
D) A, B, C depends on the angle of segment cut from disc.
Correct Answer: C
Solution :
Removed part has more mass near its circumference (away from O). So after its removal centre of mass should move nearer to O. i.e. a < d
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