Big Test Prep Questions (3 of 3)

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Homework Help Overview

The discussion revolves around a physics problem related to calculating the air drag force on the Hindenburg airship, given its cruising speed and engine power. The subject area includes concepts of power, force, and velocity in the context of fluid dynamics.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between power and velocity, with one suggesting looking up the relevant formula. There is an acknowledgment of the formula for power as the product of force and velocity.

Discussion Status

Some guidance has been offered regarding the relationship between power and velocity, and participants are exploring the implications of this relationship in solving the problem. There is an expression of self-doubt from one participant regarding their understanding of the material.

Contextual Notes

One participant notes that the problems typically encountered are not as straightforward, indicating a potential difference in difficulty level for this particular question.

Tom McCurdy
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Alright we are having a review test and I needed to go back to the stuff we did earlier this year and I am having some trouble remembering what to do...
:shy: how can i forget this stuff you ask... I don't know


The hydrogen-filled airship Hindenburg could curise at 77 knots with the engines providing 4800 hp. calculate the air drag force in Newtons on the airship at this speed.

For convince
77 knots = 39.6122 m/s
4800 hp = 3.57936*10^6


Answer:90.3 kN
 
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Do you know how power is related to velocity ? Look up the relation. That should give you the answer.
 
Power=Force*velocity

P=W/t
 
Forgive me for even asking that question...

I should fail for that alone. I looked right over the forumula... usually are problems arent' this easy thanks for the help
 

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