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2 Questions around this concept.
Have a look at the figure of solid Hemisphere
Since it is symmetrical about y-axis
So we can say that its and
Now we will calculate its which is given by
So Take a small elemental hollow hemisphere of mass dm of radius r as shown in figure.
Now have a look on elemental hollow hemisphere of mass dm of radius r
Since our element mass is hollow hemisphere so its C.O.M is at (r/2)
Now
Where,
So from base
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