There is something wrong with this vector problem

  • Thread starter Thread starter flyingpig
  • Start date Start date
  • Tags Tags
    Vector
flyingpig
Messages
2,574
Reaction score
1

Homework Statement





[PLAIN]http://img197.imageshack.us/img197/125/unledcxk.png



The Attempt at a Solution



I added the two vectors and took the tangent of it.

I got 37.7 degrees the first time, but it was wrong.

I don't even know why the magnitude is wrong.
 
Last edited by a moderator:
Physics news on Phys.org
what vectors did you add? You have to separate the original vector into horizontal and vertical components. then add the individual horizontal and vertical components.

the wind form the west, does not add or subtract from the vertical component.

A reasonable answer as to ground speed would have to be greater than the original airspeed of the airplane.
 
p = <250\sqrt{2}, 250\sqrt{2}>
w=<-80,0>

p+w =<250\sqrt{2} - 80, 250\sqrt{2}>
 
The wind from the west is moving east.

I think that is the problem here.. the east wind is contributing to the horizontal component you posted. In other words, I think you may want to try adding instead of subtracting.
 
thanks, problem solved lol
 
Thread 'Use greedy vertex coloring algorithm to prove the upper bound of χ'
Hi! I am struggling with the exercise I mentioned under "Homework statement". The exercise is about a specific "greedy vertex coloring algorithm". One definition (which matches what my book uses) can be found here: https://people.cs.uchicago.edu/~laci/HANDOUTS/greedycoloring.pdf Here is also a screenshot of the relevant parts of the linked PDF, i.e. the def. of the algorithm: Sadly I don't have much to show as far as a solution attempt goes, as I am stuck on how to proceed. I thought...

Similar threads

Back
Top