How do I determine the magnitude of a vector?

Question

bloomlocke367 · Answer

@phi @campbell_st Can one of you come help?

anonymous · Answer

The magnitude of a vector can be found by taking the square root of each of the vector components squared. For example, if you had the vector 3i+4j, to find the magnitude, you take sqrt ( 3²+4² ) To get: sqrt ( 9+16 ) sqrt ( 25 ) = 5 Works the same in 3D or more, just put all the vector components in.

akashdeepdeb · Answer

If you have a vector: 3i + 4j + 5k
The magnitude simply is $\sqrt{3^2 + 4^2 + 5^2}$

As a general principal, the magnitude of any vector in 3D space or 2D plane is simple just the distance or the length of the vector itself. Just use Pythagorus theorem.

bloomlocke367 · Answer

Oh, okay.