Question

Stokes’ law describes sedimentation of particles in liquids and can be used to measure viscosity. Particles in liquids achieve terminal velocity quickly. One can measure the time it takes for a particle to fall a certain distance and then use Stokes’ law to calculate the viscosity of the liquid. Suppose a steel ball bearing (density 7.7 × 10³ kg/m³, radius 1.25 mm) is dropped in a container of motor oil. It takes 12.5 s to fall a distance of 0.45 m. Calculate the viscosity of the oil assuming the ball achieves terminal velocity immediately.

Answer 1

Dear student. feel Free to ask doubts in comment. Trust me ! I'll surely reply within few seconds and clear your doubt.

Hope you give thumbs up.
Thanks!