A2 physics stokes law

hi
i was wondering if anyone knows how to investigate stoke's law in the lab?
wil b really useful as i need answers and i need em soon....cheers

Reply 1

pigetrational

I myself haven't tried this (someone in my class did for their coursework, stokes' law isn't in our syllabus), but one possible experiment involves a measuring cylinder filled with a liquid, and dropping a small ball bearing down the tube. If you measure the time it takes to fall a certain distance, this will give you a rough value for the terminal velocity, and so you can then use Stoke's Law to estimate the viscosity. You could then compare this with known laboratory values. Make sure that the ball bearing is much smaller in diameter than the measuring cylinder.

See this on wikipedia http://en.wikipedia.org/wiki/Stokes%27_law#Applications, and this http://en.wikipedia.org/wiki/Viscometer

Reply 2

DrVas

n-smash