This apparatus is designed to demonstrate the concept of center of gravity (CG) to the students and recognize the importance of center of gravity in design and structural engineering. In this apparatus students will determine center of gravity of different bodies of regular and irregular shapes, CG of irregular shapes are determined by Plumb Line Method using the 4 holes in the plate.
The centre of gravity of a shape of uniform thickness can easily be found by this method. It provides a simple technique for complicated shapes, far quicker than by using calculus for example, although not producing an accurate answer to the handling of a yacht, the calculation of the moments caused by the wind and water acting at the centre of lateral area’ of the sails and keel are still used as a starting point.
A free standing backboard has a pin from which a selection of flat shapes can be hung. A simple pendulum suspended from the pin enables the line of action of the weight to be transferred to the lamina. The centre of gravity is the position on the shape where two or more such lines intersect.
A complete instruction manual is provided describing the apparatus, its application, experimental procedure and typical test results.