We can find out the CG of a triangular object by drawing lines from A to the midpoint of BC, from B to midpoint of AC, and from the C to the midpoint of AB. This gives us the CG of the rectangle as 20, 10.
We do this by, drawing the diagonals AC & BD then measuring the intersecting point of the diagonals from A and B. To find the CG of a rectangular object we need to again find it’s centre. The above is a 40 mm diameter circular object, it’s centre of gravity is it’s geometric centre so at 20,20. I will start this with the easiest of all the geometries, circle. We will mainly use the following commands in addition to the other AutoCAD commands.įinding A Regular Shape’s Centre of Gravity
In the case of an irregular shape, we can find it using AutoCAD commands.In the case of a composite shape, we can find it either by locating it’s centres or by using AutoCAD commands.In the case of a regular shape, we can find it by locating its centre.In the AutoCAD 2D we can measure it in the following ways:
It is particularly useful for designing objects (bridges, buildings etc) and also in predicting how an object will move when acted on by a force, whether that is gravity or another force.