Forces along non-perpendicular axes

Imbellis

Homework Statement
F2 = 8kN; Determine the magnitude of F2 along axis u and axis v.
Homework Equations
CompF = F*Cos(angle)  Determine Force from F2 along u and v axes.
CompF= F*Cos(angle);
CompF onto U = 8kN*Cos(30) = 6.93kN
Angle between F2 and V: 180-75 = 105; 105-30 = 75 degrees
CompF onto V = 8kN*Cos(75) = 2.07 kN. Since in the -V direction; -2.07kN.

I just would like for somebody to verify these answers. I've already missed credit on the problem (Answers shown below), I'm just clueless how they got those numbers. Related Introductory Physics Homework Help News on Phys.org

haruspex

Homework Helper
Gold Member
2018 Award
Your answers are correct. I cannot even figure out what blunder was made in the given answer.
Quite often, it looks like someone modified the numbers in an existing question but failed to update the answer. This one looks weirder.

• Imbellis

Imbellis

Your answers are correct. I cannot even figure out what blunder was made in the given answer.
Quite often, it looks like someone modified the numbers in an existing question but failed to update the answer. This one looks weirder.
Thanks for the confirmation! I just wanted to make sure I wasn't going crazy (I'm an undergrad and would be quite nervous if I made a mistake on a question like this) .

"Forces along non-perpendicular axes"

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving