How much work is done? (Frictionless plane, xy coodrinates)

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Homework Help Overview

The problem involves a coin sliding over a frictionless plane in an xy coordinate system, with a constant force acting on it. The task is to determine the work done by this force during the coin's displacement from the origin to a specified point.

Discussion Character

  • Exploratory, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to use the equation involving force components and displacement to calculate work done. Some participants ask for clarification on the specific steps taken and the results obtained, indicating a need for more detailed information to assist effectively.

Discussion Status

The discussion includes attempts to clarify the original poster's process and reasoning. There is acknowledgment of the right approach, though execution issues are noted. The original poster later indicates they have resolved their confusion.

Contextual Notes

There is a mention of insufficient initial information provided by the original poster, which may have hindered the assistance offered by others.

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Homework Statement



A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (1.5 m, 4.5 m) while a constant force acts on it. The force has magnitude 7.8 N and is directed at a counterclockwise angle of 105° from the positive direction of the x axis. How much work is done by the force on the coin during the displacement?

Homework Equations



I used the equation Fxdx + Fydy = W


The Attempt at a Solution



I used cosine and sine to find the x and y components of the Force. And the x and y coordinates for the displacement were already given. I figured everything would work when I plug those in, but I had no luck. Any idea what I did wrong?
 
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What did you do exactly?
 
If you give what you did exactly, and what answers you got it would be easier to help you. You have the right idea, just aren't executing it properly.
 
Thanks for trying to help - sorry for the lack of information. But I figured it out.
 

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