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Question From Readers #20 Calculate The New KG


A vessel's displacement is 2,400 tons and her KG is 10.8 meters. What is the new KG if a weight of 50 tons already on board is raised 12 meters vertically?

Given:

Displacement = 2, 400 tons
       Distance = 12 meters
         Weight = 50 tons
               KG = 10.8 meters

Find:
          New KG

Solution:

1. Shifting of Weights

                              GG1 = Weight x Distance
                                            Displacement
                                      = 50 tons x 12 m
                                            2, 400 tons
                                      = 600 tons meter
                                            2, 400 tons
                               GG1 = 0.25 m

2. The problem states that a weight is shifted vertically to 12 meters, so we can see that the weight is shifted upwards because our KG is only at 10.8 m. From this given situation we can conclude that KG will increase. So, what we are going to do this is to add our answer in step 1 to the old KG.

                           Old KG = 10.8 m
                               GG1 =   0.25 m
                          New KG = 11.05 m will be the height of the center of gravity

Thank you for submitting this question. If you have more or you want clarification, feel  free to raise it. Once again, Thanks.

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