Vectors using the component method

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Discussion Overview

The discussion revolves around the use of the component method to add vectors, specifically focusing on calculating the resultant vector in unit-vector notation. The context includes a problem involving a vector with a given length and angle, requiring participants to express the result in terms of its components.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant has calculated the x-component of the vector using cosine but is uncertain about how to find the y-component.
  • Another participant suggests using the sine function to find the y-component.
  • A third participant points out that a figure referenced in the problem is not visible in the thread.
  • A later reply emphasizes that the solution involves basic trigonometry.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the approach to finding the y-component, and there is uncertainty regarding the visibility of the figure necessary for the problem.

Contextual Notes

The discussion lacks a visual reference that may be crucial for understanding the problem, and there are unresolved steps in the mathematical reasoning regarding the y-component calculation.

farhana21
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Use the component method to add the vectors and shown in the figure. The length of is 2.55 m and the angle θ = 31.5°. Express the resultant + in unit-vector notation.

The answer should be in the form of ...i + ...j

so far i have done

3*cos(31.5) = 2.56 so this is for ...i but I am unsure of how to find vector j for the y axis.

Please could someone advise me. All help and guidance given is much appreciated
 
Physics news on Phys.org
sin? ;)

I don't see a figure.
 
Well, my hint stays the same.
It is just trigonometry.
 

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