For which of the following objects the centre of gravity(cog) is correctly represented?

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None of the above

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Solution

The correct option is B

The centre of gravity of an object is the point through which entire weight of the object appears to act. For regular objects, the centre of gravity lies at their geometrical centre. All the objects given above are symmetrical and their $c o g$ has to lie at their geometrical centre. From the above figures, $c o g$ was correctly represented for circular disc.

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