(1) Centre of gravity (C.G.) of a body i...

(1) Centre of gravity (C.G.) of a body is the point at which the weight of the body acts,
(2) Centre of mass coincides with the centre of gravity if the earth is assumed to have infinitely large radius,
(3) To evaluate the gravitational field intensity due to any body at an external point, the entire mass of the body can be cosidered to be concentrated at its C.G..,
(4) The radius of gyration of any body rotating about ab axis is the length of the perpendicular dropped from thr C.G. the body to the axis. which one of the following paires of statements is correct ?

`(4) and (1)`

`(1) and (2)`

`(2) and (3)`

`(3) and (4)`

Verified by Experts

The correct Answer is:

The statement (1) and (4) are true.
Thus option (a) is correct.

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The weight of the body at the centre of the earth is :

infinite

zero

slightly less than that at the equator

slightly move than at the equator

same as on surface of Earth

half of that on surface

infinite

zero

Zero

Infinite

Same as on the surface of earth,

None of these.