Calculating Force of Asteroid Slowing Down

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    Asteroid Force
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Homework Help Overview

The problem involves calculating the force acting on an asteroid that slows down from a speed of 7100 m/s to 5700 m/s over a distance of 1.50 x 10^6 m. The mass of the asteroid is given as 4.10 x 10^4 kg, and the work done on the asteroid is noted as -3.6736e11 J.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between work and force, questioning the vector nature of work and the angle theta in the force equation. There is an attempt to clarify the meaning of distance and the assumptions regarding the direction of the force.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the angle theta and its relevance to the problem. Some have expressed that the formulas appear correct, while others suggest that the problem may be simpler than initially thought. There is no explicit consensus on the approach to finding theta.

Contextual Notes

Participants note that the problem is part of a high school physics assignment and that the urgency of completing it may influence the discussion. There is mention of the problem being a webassign question, which may impose specific constraints on how it should be approached.

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Homework Statement




The asteroid has a mass of 4.10 x 10^4 kg, and the force causes its speed to change from 7100 m/s to 5700 m/s.

If the asteroid slows down over a distance of 1.50 x 10^6 m, determine the magnitude F of the force.


Homework Equations



w = -3.6736e11 J (I figured this out from a question before it that I didn't post)
F = W/(s(cos(theta)))

The Attempt at a Solution



F = (-3.6736e11) / ((1.50 x 10^6)(cos(theta)))

I was just wondering how you would find theta for this problem.
 
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Your s=distance? also since when was work a vector quantity? and theta should be zero since the problem never mentions any angles.
 
Yes. Sorry I didn't make that clear.
 
check my edit
 
I got it. Thanks for your help.
 
No problem just curious is this high school physics?
 
it seems that you have the right formulas. maybe you just complicated the question in high school.it wants us to find out the force in a giving distance, assuming that the force must be a constant of vector in the same direction of movement.

but for physics, i quite agree with you. we can't figure it out without theta.
conclusion is that:don't take too much time for the question in the books.
 
badreligion said:
No problem just curious is this high school physics?

Actually, yes. It was a webassign problem and the only one I had left so I was pretty anxious to get it done before it was time for me to submit it (hence why I ended up here after a few seconds on google lol).
 

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