Determination of Grease Viscosity Using Sliding Block Experiment

[Louisa88]

Homework Statement

A small block is attached on the left of a larger block by a thin layer of grease, 2 micrometres (10^-6) thick. The mass of the smaller block is 0.15 kg and the area of contact is 8x10^-4 metres squared. If the smaller block slides down 5 mm in 2 weeks, calculate the viscosity of the grease. ANSWER: 9.07x10^5 Pa.s

Homework Equations

A formula which may help is Force/Area = Viscosity(change in velocity)/distances between areas of contact F/A = (n x delta v)/delta x

The Attempt at a Solution

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[Redbelly98]

Welcome to Physics Forums.

That looks like the right equation. Try plugging in the information you are given.