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The centre of mass moves as if all the mass were concentrated:
AAt the edges
BAt the base
CAt that point
DAt the surface
Answer & Solution
Correct answer: C. At that point
1. The centre of mass sums up the motion of a whole system.
2. External forces are treated as acting there too.
3. So it moves as if all the mass sat at that point.
_Source: NCERT Class 11 Physics Part I, Chapter 7, Systems of Particles and Rotational Motion._
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