A small disc of radius 2 cm is cut from a disc of radius 6 cm. If the distance between their centers is 3.2 cm, what is the shift in the center of mass of the disc?
Text Solution
Verified by ExpertsThe correct answer is:
A
Let radius of complete disc is R and that of small disc is
. Also, let centre of mass now
shifts to
at a distance
from original center.

The position of new center of mass is given by
, where,
mass per unit area
Here,
Hence, 

Negative sign indicates the shift is towards left.
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