Question

define the term centre of gravity of a body?​

Answer 1

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The Centre of Gravity of a body is the point about which the algebraic sum of moments of weights of all particles constituting the body is zero.

The entire weight of the body can be considered to act at this point, howsoever the body is placed.

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Answer 2

centre of gravity,in physics,an imaginary point in a body of matter where,for conveniences,the total weight of the body may be thought to be concentrated. ...in a uniform gravitational is identical to the centre of mass,a term preferred by physicists.