Coefficient of friction due to water

AI Thread Summary
The discussion centers on the coefficient of friction in water, particularly regarding a submarine being pulled through it. It is clarified that this is not a straightforward friction problem but rather a complex fluid dynamics issue involving viscosity. The key takeaway is that viscosity, rather than a simple friction coefficient, is the relevant factor to consider in this scenario. Participants emphasize the difficulty of the problem and suggest that understanding viscosity is crucial for solving it. Overall, the conversation highlights the complexity of fluid dynamics in relation to friction in water.
spri4
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I wasnt able to find anything on the internet, so maybe someone else can help. I need to know the coeifficient of friction due to water. Like say a submarine is being pulled by something through the water and what i need to know is what would the friction be for the submarine (if there is a universal number for friction by water) or how to solve for it. I am in 11th grade so hopefully the answer isn't too complicated.
 
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Thats going to be next to impossible for you to find. Its not a simple friction problem, but a complicated fluid dynamics problem. This is a very, very, very, tough problem.
 
Hi spri4! Welcome to PF! :smile:

Basically, friction is where the thing you're rubbing against stays where it is.

But when you move through a fluid (treacle, water, air, …), you drag some of the fluid with you. That's called viscosity, of course.

You need the viscosity, not the friction! :smile:

(You could try: http://en.wikipedia.org/wiki/Viscosity - but I don't recommend it! :smile:)
 
Thanks.
 

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