Solving the Mystery: Calculating Terminal Velocity

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Homework Help Overview

The problem involves calculating the effective area of a hero using a tarp to reduce terminal velocity, comparing it to a skydiver with known parameters. The context is within fluid dynamics, specifically focusing on drag force and terminal velocity concepts.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants express uncertainty about how to proceed with the problem due to missing values for air density and drag coefficient. There is a suggestion to consider the relationship between drag force in both scenarios.

Discussion Status

The discussion is ongoing, with participants questioning the necessary parameters to solve the problem. Some guidance has been offered regarding the drag force relationship, but no consensus or clear direction has emerged yet.

Contextual Notes

Participants note the absence of specific values for air density and drag coefficient, which are critical for solving the problem. There is also a mention of homework constraints that may limit the information available to them.

Zmuffinz
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Homework Statement



Marks: 1 In a recent mystery, the hero saves himself by spreading out a windshield tarpaulin to reduce his terminal velocity. A skydiver of 75 kg mass has a terminal velocity of 60 m/s. If the hero has the same 75 kg mass, the same density as the sky diver, and a drag coefficient twice as large with the tarp, by what factor is his effective area greater than the 0.70 m2 area of the skydiver?

Homework Equations



Drag force= 1/2DPairAV^2

The Attempt at a Solution

 
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Zmuffinz said:

Homework Statement



Marks: 1 In a recent mystery, the hero saves himself by spreading out a windshield tarpaulin to reduce his terminal velocity. A skydiver of 75 kg mass has a terminal velocity of 60 m/s. If the hero has the same 75 kg mass, the same density as the sky diver, and a drag coefficient twice as large with the tarp, by what factor is his effective area greater than the 0.70 m2 area of the skydiver?

Homework Equations



Drag force= 1/2DPairAV^2

The Attempt at a Solution

You seem to have forgotten to complete section three.
 
Last edited:
yea i didnt know what to do for the question, i can't get the density of air or drag coeffient so i can't work anything out by rearranging the equation for A
 
Zmuffinz said:
yea i didnt know what to do for the question, i can't get the density of air or drag coeffient so i can't work anything out by rearranging the equation for A
HINT: What do you know about the drag force in both cases?
 

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