Page 27 - statbility for masters and mates
P. 27
Centroids and the centre of gravity 15
Fig. 2.8
4. The shift of the centre of gravity of the body in each case is given by the
formula:
GG1 w dmetres W
where w is the mass of the weight added, removed, or shifted, W is the ®nal mass of the body, and d is, in 1 and 2, the distance between the centres of gravity, and in 3, the distance through which the weight is shifted.
5. When a weight is suspended its centre of gravity is considered to be at the point of suspension.
Example 1
A hold is partly ®lled with a cargo of bulk grain. During the loading, the ship takes a list and a quantity of grain shifts so that the surface of the grain remains parallel to the waterline. Show the effect of this on the ship's centre of gravity.
