Q.

Figure shows a uniform disc of radius R from which a hole of radius R/2 has been cut out from left of the centre and is placed on right of the centre of disc. The centre of mass of resulting disc is at a distance R/n from centre of uniform disc. Find the value of n

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answer is 00004.00.

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Detailed Solution

Xcm=σπR2(O)+σπR22R2+(−σ)πR22−R2σπR2+σπR22+(−σ)πR22
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Figure shows a uniform disc of radius R from which a hole of radius R/2 has been cut out from left of the centre and is placed on right of the centre of disc. The centre of mass of resulting disc is at a distance R/n from centre of uniform disc. Find the value of n