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Q.

An object comprises of a uniform ring of radius R and its uniform chord AB (not necessarily made of the same meterial) as shown. Which of the following can not be the centre of mass of the object?

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a

(R3,R2)

b

(R2,R2)

c

(R3,R3)

d

(R4,R4)

answer is B.

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Detailed Solution

The mass distribution is symmetrical about the line y=x, hence the possible  x and v coordinates of the centre of mass should be equal.

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