Find the y-compnent of the force

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Homework Help Overview

The problem involves calculating the y-component of the force between two charged objects, A and B, with specified charges and positions. The context is rooted in electrostatics, specifically applying Coulomb's law to determine the force exerted by one charge on another.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the application of Coulomb's law and the calculation of force, with one participant questioning their own calculations and another providing a similar result. There is also a discussion about the relevance of the question's wording regarding the y-component.

Discussion Status

The discussion is active, with participants sharing their calculations and questioning the clarity of the problem statement. Some guidance has been offered regarding the interpretation of the question, but no consensus has been reached on the specifics of the calculations.

Contextual Notes

There is a noted confusion regarding the necessity of calculating the y-component when both charges are aligned along the y-axis. This suggests a potential oversight in the problem's phrasing or intent.

kdizzle711
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Homework Statement


Object A, which has been charged to + 21.2nC , is at the origin. Object B, which has been charged to + 19.7nC , is at (x,y)= (0cm, 2.80cm) .

What is the y-component of the force (F a on b)y on B due to A

Homework Equations



F=K(q1)(q2)/(r^2)

The Attempt at a Solution



F= (9*10^9)*(21.2*10^-9)*(19.7*10^-9)/(.028^2)
= .0047N

Where am I messing up? Thanks
 
Last edited:
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kdizzle711 said:

Homework Statement


Object A, which has been charged to + 21.2nC , is at the origin. Object B, which has been charged to + 19.7nC , is at (x,y)= (0cm, 2.80cm) .

What is the y-component of the force (F a on b)y on B due to A

Homework Equations



F=K(q1)(q2)/(r^2)

The Attempt at a Solution



F= (9*10^9)*(21.2*10^-9)*(19.7*10^-9)/(.028^2)
= .0047N

Where am I messing up? Thanks

From your statement of the problem I get 4.8*10-3 N in the positive y direction.

Which is seemingly about the same as yours. Is there a preference for how the answer should be entered perhaps?
 
EDIT: oops! misread it. :redface:

Thanks, LowlyPion! :smile:

(though why does the question bother to ask for the y-component if everything's on the y-axis anyway? :rolleyes:)
 
Last edited:
Edit: Agreed. The wording of the OP seems more designed to encourage careful reading than grasping the concepts. I suppose it is preparation for latter problem statements.
 
Last edited:

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