The Effect of Weight and Shape on Buoyancy

Overview

Objectives/Goals The objective is to find out the effect of weight and shape on buoyancy. Methods/Materials Modeling clay was shaped into three different weights and four different shapes (sphere, pyramid, cube and hull). Each was attached to a spring scale and lowered into a beaker of water. The force in newtons was recorded first out of the water and after being immersed. The volume of water displaced by the object was also recorded. This procedure was repeated 30 times in water, as well as immersing the objects in oil and in vinegar. The entire process was repeated for all three liquids, changing the substance from modeling clay to playdough. Results When changing the weight of the object, the buoyant force increased as the weight increased. When changing the shape of the object, the buoyant force remained the same except for the hull shaped object. Conclusions/Discussion My hypothesis was supported by the data because the results have shown that the weight will have an effect on buoyancy, but the shape will not unless shaped as a hull. These results support Archimedes Principle of buoyancy.

Competition history

• CSEF 2012 Physics & Astronomy · Entry J1820

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