A duck is floating on a lake with 25% of it's volume beneath the water

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Homework Help Overview

The problem involves a duck floating on a lake, with a specific focus on determining the average density of the duck based on the proportion of its volume submerged in water. The subject area relates to fluid mechanics and buoyancy principles.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between the weight of the duck and the buoyant force acting on it. There are attempts to clarify the definitions of these forces and how they relate to the problem of finding the duck's average density.

Discussion Status

The discussion is ongoing, with participants providing guidance on equating the weight of the duck to the buoyant force. Some participants express uncertainty about how to proceed with the calculations, indicating a need for further exploration of the concepts involved.

Contextual Notes

There appears to be some confusion regarding the calculation of buoyant force and its relation to the submerged volume of the duck. Participants are encouraged to share their attempts to facilitate further assistance.

Mr. Fish
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Homework Statement



A duck is floating on a lake with 25% of it's volume beneath the water. What is the average density of the duck?

Homework Equations



Not sure of going about this problem

The Attempt at a Solution



I know that p(rho) = m/V
 
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You need to equate the weight of the duck with the buoyant force exerted by the water on the duck.
 


Pranav-Arora said:
You need to equate the weight of the duck with the buoyant force exerted by the water on the duck.

Ok well than F(buoyant) = F(duck)?
 


Mr. Fish said:
Ok well than F(buoyant) = F(duck)?

Yes. :smile:

I guess it would be better to write F(duck) as weight of duck.
 


Pranav-Arora said:
Yes. :smile:

I guess it would be better to write F(duck) as weight of duck.

I'm still lost on finding the average density of the duck.
 


Mr. Fish said:
I'm still lost on finding the average density of the duck.

Please show us your attempt so that we can help you.

What's the buoyant force on the duck?
 


Pranav-Arora said:
Please show us your attempt so that we can help you.

What's the buoyant force on the duck?

The buoyant force is the 25% of t he duck submerged into the water?
 

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