Rotational MotionHard
Question
Choose the correct statement:
(1) Centre of gravity (C.G) of a body is the point at which the weigth of the body acts
(2) Centre of mass conincides with the centre of gravity if the earth is assumed to have infinitely large radius
(3) To evaluate the gravitational field of intensity due to any body at an external point, the entire mass of the body can be considered to be concentrated at its C.G.
(4) The radius of gyration of any body rotating about an axis is the from length of the perpendicular dropped from the C.G. of the body to the axis.
(1) Centre of gravity (C.G) of a body is the point at which the weigth of the body acts
(2) Centre of mass conincides with the centre of gravity if the earth is assumed to have infinitely large radius
(3) To evaluate the gravitational field of intensity due to any body at an external point, the entire mass of the body can be considered to be concentrated at its C.G.
(4) The radius of gyration of any body rotating about an axis is the from length of the perpendicular dropped from the C.G. of the body to the axis.
Options
A.(4) and (1)
B.(1) and (2)
C.(2) and (3)
D.(3) and (4)
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