For determining centre of mass of a body why a body is considered as composited of multiple of small mass elements ?
For determining centre of mass of a body why a body is considered as composited of multiple of small mass elements ?
There are large number of particles (atoms or molecules) in a rigid body and distance between particles is small. Hence, it is not possible the sum of multiplication of mass and distance and hence body is considered as small element of mass in $n$ divisions.
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