Question

Select WRONG statement about centre of mass: *

1) Centre of mass of a ‘C’ shaped uniform rod can never be a point on that rod

2) If the line of action of a force passes through the centre of mass, the moment of that force is zero

3) Centre of mass of our Earth is not at its geometrical centre

4) While balancing an object on a pivot, the line of action of the gravitational force of the earth passes through the centre of mass of the object.



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Answer 1

wrong statement:

(C) Centre of mass of our Earth is not at its

geometrical centre.

Answer 2

ÁñẞwÉr

The wrong statement:

•The centre of mass is that if the line of action of a force to the centre of the mass of the force is zero.

√Option b

Explanation:

•Centre of mass is a concept in physics in which all the mass of the particles constituting a particular body is concentrated.

•This means that the mass of an extended body x through the centre of mass of that object. Hence it is useful for balancing the substance. From the centre of mass the mass is distributed equally on all four sides in a three dimensional figure.

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