Geometric Vectors

[Anel Avenger]

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I need help on this problem, Iv never seen this subject before and im completely lost

 

[Quaid]

Hello! There are many lessons and examples on the Internet, to explain the parallelogram method.

Google keywords: vector addition parallelogram method

If you see something that you don't understand -- in a lesson or example -- then come back and ask about it, and we can go from there.

Cheers

 

[Anel Avenger]

Thanks, Il do so.
This subject is all greek to me.
Hue

 

[HallsofIvy]

Your teacher who gave you this problem clearly expects you to know what "adding vectors" means and how to do it. If you do not know that, you need to talk to your teacher.

 

[Anel Avenger]

Your teacher who gave you this problem clearly expects you to know what "adding vectors" means and how to do it. If you do not know that, you need to talk to your teacher.

Im taking an online course for summer school, Iv never heard of vectors of polar coordinates. In my geometry class we left off at doing trig. Id never even heard of graphing ellipses, Hyperbolas, or half the things in this class. Im back because i need help on this problem, Iv watched the videos and i still dont understand how to solve this, Google gives me no results. "An airplane is on a route from New York City to Madrid. The velocity of the plane is represented by v=30t - 492j + 42k What is the magnitude of the velocity of the airplane?"

 

[Quaid]

v = 30t - 492j + 42k

What is the magnitude

The t above should be i.



Geometrically, the magnitude of a vector is its length (i.e., the distance from its tail to its head).


For vectors in two dimensions:

v = Ai + Bj and the magnitude is |v| = √(A² + B²)



For vectors in three dimensions:

v = Ai + Bj + Ck and the magnitude is |v| = √(A² + B² + C²)

In your exercise, they've given you the values of A, B, and C.

Cheers

PS: Please start a new thread for each new exercise.

 

[HallsofIvy]

Im taking an online course for summer school, Iv never heard of vectors of polar coordinates. In my geometry class we left off at doing trig. Id never even heard of graphing ellipses, Hyperbolas, or half the things in this class. Im back because i need help on this problem, Iv watched the videos and i still dont understand how to solve this, Google gives me no results. "An airplane is on a route from New York City to Madrid. The velocity of the plane is represented by v=30t - 492j + 42k What is the magnitude of the velocity of the airplane?"

Do you know what "magnitude of the velocity" means? If your course assumes you know "vectors", "polar coordinates, etc. and is not just introducing them in this course, you are in a course that is too advanced for you and need to drop back to one that is appropriate. On the other hand, the problems you cite seem to me like those you would expect if your are being introduced to those things. In that case, the basic definitions should be in your textbook or other class materials.

You say "Google gives me no results". Would you recognize "results" if it did? I went to google, typed in "magnitude" and even before I could type "of a vector" it was giving me such things as "magnitude of a vector formula" which is exactly what you want for that last problem.