A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs coincide The centre of mass of the new disc is from the centre of the bigger disc . The value of
is
Option 1)
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Option 2)
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Option 3)
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Option 4)
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As we learnt in
Position of centre of mass when some mass is removed -
- wherein
m1 is value of whole mass and is position of centre of mass for whole mass. m2 &
are values for mass which has been removed.
Because for the full disc, the centre of mass is at the centre O
The centre of mass is at R/3 to the left on the diameter of the original disc.
The question should be at a distance and not
.
Option 1)
Option 2)
Option 3)
Option 4)
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