Trouble with drawing vector diagrams.

AI Thread Summary
Understanding vector directions can be confusing, particularly with terms like "E 25 degrees S," which means moving east and then south at a 25-degree angle. This notation is equivalent to saying "25 degrees S of E," indicating a downward angle from the eastward horizontal. The discussion highlights the variability in how these directions are expressed, with some preferring one notation over the other. New students often find this aspect of vector diagrams challenging, but both notations convey the same information. Clarity in interpretation is essential for solving vector-related problems effectively.
dinayork
Messages
1
Reaction score
0

Homework Statement


Total time 2min, duck travels 22 m 36degree N of E,then 65m E 25degree S.


Homework Equations





The Attempt at a Solution


i understand 36 N of E but what is E 25 degree S.
 
Physics news on Phys.org
"E 25 degrees S" is the same as "25 degrees S of E": If "East" is to the right, then "E 25 degrees S" is at an angle 25 degrees below the horizontal. You can interpret "E 25 degrees S" as "first go E then go S until you reach an angle of 25 degrees".
 
Yes, it's just two different ways of writing vectors. It can be frustrating to new students of vectors. In my school, the math teachers write E25S but I usually write 25 S of E. I'm not sure which is better, sometimes I think I should just do it the way the math teachers do.
 
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...
Back
Top