An Investigation into the terminal velocity of steel ball bearings in Glycerol.

... Physics A2 Coursework - An Investigation into the terminal velocity of steel ball bearings in Glycerol Hypothesis In this experiment, I plan to investigate the relationship between velocity and viscosity, as this is something that has always interested me. I am going to carry out an experiment to find the terminal velocity of steel ball bearings in glycerol. According to Stoke's Law, spheres falling through a fluid exhibit the following relationship: 4/3 ? r² (?-?) g = 6 ? ? r vt Therefore: vt = 2 r² (?-?) g 9 ? Where ? is viscosity, ? is fluid density, ? is sphere density, r is radius of the sphere and vt is the terminal velocity. From this we can conclude that terminal velocity is proportional to radius². Investigation In this investigation there are several variables that will affect the final results. All the following variables have been considered and so, various precautions have been taken to minimise their influences. Temperature - If

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