How to Find the Resultant Velocity of a Plane with a Wind?

  • Thread starter Thread starter shizupple
  • Start date Start date
  • Tags Tags
    Planes Velocity
AI Thread Summary
To find the resultant velocity of a plane flying north at 230 km/h while being pushed east by a wind at 56 km/h, the magnitude is calculated to be 236.7 km/h. The initial attempt to determine the direction using the tangent function resulted in an angle of 13.7 degrees, which was incorrect for the problem's requirements. The correct angle, measured from the north towards the east, is 76.3 degrees. The confusion arose from the interpretation of the angle's reference point. Ultimately, the solution was clarified, leading to the correct resultant velocity and direction.
shizupple
Messages
20
Reaction score
0

Homework Statement



Kyle is flying a plane due north at 230 km/h as a wind carries it due east at 56 km/h. Find the magnitude and direction of the plane's resultant velocity analytically.
236.7 km/h (magnitude)
° (direction)


Homework Equations



Tan=opp/adj


The Attempt at a Solution



This should be straightfoward but i guess not?
I tried:
tan^-1 (56/230)=13.7 degrees

Cant seem to figure out why this isn't working it should be straightfoward
 
Physics news on Phys.org
I don't see anything wrong. Why do you think it isn't working?
 
My webassign is marking it wrong... i don't see how it is wrong though??!
 
Nevermind I got it they wanted the angle from the other side (76.3). Thanks!
 
I tried to combine those 2 formulas but it didn't work. I tried using another case where there are 2 red balls and 2 blue balls only so when combining the formula I got ##\frac{(4-1)!}{2!2!}=\frac{3}{2}## which does not make sense. Is there any formula to calculate cyclic permutation of identical objects or I have to do it by listing all the possibilities? Thanks
Since ##px^9+q## is the factor, then ##x^9=\frac{-q}{p}## will be one of the roots. Let ##f(x)=27x^{18}+bx^9+70##, then: $$27\left(\frac{-q}{p}\right)^2+b\left(\frac{-q}{p}\right)+70=0$$ $$b=27 \frac{q}{p}+70 \frac{p}{q}$$ $$b=\frac{27q^2+70p^2}{pq}$$ From this expression, it looks like there is no greatest value of ##b## because increasing the value of ##p## and ##q## will also increase the value of ##b##. How to find the greatest value of ##b##? Thanks

Similar threads

Back
Top