Physics 103A LAB 7: ARCHIMEDES’ PRINCIPLE AND DENSITY
1. INTRODUCTION: The experiment helped understand the concept of Archimedes Principle and the relationship between gravity and buoyant force to explain density in a certain object. According to Archimedes Principle, the buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object and given by B = W= MG. Because pressure (Pgauge=ρgh)(Pgauge}=\rho gh)(Pgauge=ρgh) increases as you go deeper in a fluid, the force from pressure exerted downward on the top of the object will be less than the force from pressure exerted upward on the bottom of the object. The reason there’s a buoyant force is because of the rather unavoidable fact that the bottom of an object is always deeper in a fluid than the top of the object. This means the upward force from water has to be greater than the downward force from water. When measuring the buoyancy, this leads to the formula B=W - W`, that takes into account the apparent weight of the object submerged and unsubmerged. By finishing the measurements it will confirm Archimedes Principal by checking the densities of the unknown substances compared to the results of already measured substances.
- Summer '20
- Buoyancy, Archimedes