Calculating Viscosity of Newtonian Fluid

[physics_forums]

Homework Statement

A shearing force of 100 dynes is applied to the side of a rectangular plate of 5 x 10 cm dimensions placed on top of a 0.5 mm high column of Newtonian fluid that is initially at rest. As a result of the shearing force, the plate moves at a speed of 11.2 cm/sec. What is the viscosity of this Newtonian fluid? (5 pts)
PS: Can you guess what this fluid is?

Homework Equations

Viscosity = (Force/Area)/(Velocity/Length)

The Attempt at a Solution

Force = 100 dynes
Area= 50 cm^2
Velocity= 11.2 cm/sec
Length= .05 cm

Viscosity = (100/50)/(11.2/.05)
=(2)/(224)
=.00893 Poise
=.0000983 CeniPoise


Can someone double check my work and see if I am on the right track? I am positive I have the right inputs and the right equation, but I have a feeling I am messing up on the units because the answer seems way too low. Thanks in advance!

 

[nicktacik]

I think you moved your decimal place the wrong way when you converted to cP.

 

[physics_forums]

Yes, yes I did. So then the viscosity would be .893, so would that make the Newtonian fluid be water? Water is at 1 Centipose and that's the closest thing to my answer. Thanks for the look out Nick