Solve Vector Force Problem with Trigonometry: Step-by-Step Guide"

  • Thread starter Thread starter neurotikfisch
  • Start date Start date
AI Thread Summary
The discussion revolves around solving a vector force problem using trigonometry. The user calculated the necessary force as 69.28N and the Y component as 34.90N but was uncertain about the relevance of a 20-degree angle in their calculations. Other participants clarified that the angle does not impact the solution to the specific question posed, although it would affect the force's overall effect. The user expressed gratitude for the clarification. Understanding the role of angles in vector problems is essential for accurate calculations in physics.
neurotikfisch
Messages
8
Reaction score
0
Having some trouble with this exercise; help appreciated! :]

Homework Statement



8hVc5l.jpg


Homework Equations



Fx + Fy = F
Pythagorean Theorem


The Attempt at a Solution



7Bkkql.jpg


basically I used the trigonometric identities to conclude that the necessary force was 69.28N and the Y component of the force was 34.90N


I'm sure I'm going to feel pretty dumb after it clicks, but I'm not sure what to do about the 20deg angle that's thrown into the problem. Should I have used that in my trigonometric calculations?
 
Physics news on Phys.org
hi neurotikfisch! :wink:
neurotikfisch said:
I'm sure I'm going to feel pretty dumb after it clicks, but I'm not sure what to do about the 20deg angle that's thrown into the problem. Should I have used that in my trigonometric calculations?

no, it makes no difference to the question asked :smile:

(it will of course affect the effect of the force … but the question doesn't ask for that! :biggrin:)
 
tiny-tim said:
hi neurotikfisch! :wink:


no, it makes no difference to the question asked :smile:

(it will of course affect the effect of the force … but the question doesn't ask for that! :biggrin:)


Thank you so much! :D
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...

Similar threads

Back
Top