C: Finding Resultant Forces at an Angle

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Homework Help Overview

The discussion revolves around finding the resultant of two forces, specifically 67.2 lb and 57.3 lb, which are applied at an angle of 47 degrees. The subject area pertains to vector addition in physics.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the use of the cosine rule for calculating the resultant force and express uncertainty about subsequent steps. There is mention of drawing a vector diagram and determining the components of the forces in both x and y directions.

Discussion Status

The conversation is ongoing, with participants exploring different methods for vector addition. Some guidance has been offered regarding drawing diagrams and calculating components, but there is no explicit consensus on the approach to take.

Contextual Notes

Participants are encouraged to show their work and reasoning, indicating a focus on understanding the process rather than simply obtaining a solution.

coolone_888
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Forces of 67.2lb and 57.3lb are exerted at an angle of 47 degrees. What is their resultant?
 
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coolone_888 said:
Forces of 67.2lb and 57.3lb are exerted at an angle of 47 degrees. What is their resultant?
Show us what you have done first. How do you add these forces?

AM
 
well i know you use c2=a2+b2-2ab cos C. but then I am not sure what to do next.
 
coolone_888 said:
well i know you use c2=a2+b2-2ab cos C. but then I am not sure what to do next.
Draw a vector diagram. Place one vector along the x axis. The other 47 degrees from the axis with its tail on the head of the first. Draw the resultant. What is the component of the second vector in the y direction? What is its component in the x direction? Add the x components to get the x component of the resultant. What is the y component of the resultant?

AM
 

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