Vectors

[shermaine]

What's the meaning of unit vector and direction vector? Pls advise.

 

[crust]

Unit vector generally refers to a vector of unit length (i.e. its length is "1"). A direction vector usually points from a source point to a destination point.

 

[Russlk]

The unit vector has only an angle associated with it, the direction vector could also have a length value.

 

[ljcox]

A unit vector has a magnitude of one. To derive the unit vector from a direction vector (or any other type of vector) you divide the vector by its modulus.

if V = ai + bj + ck, then the modulus is V' = SQRT(a*a + b*b + c*c)

So the Unit vector is U = V/V'


Len

 

[shermaine]

Hello,

Is there any great website that i can read on? Me really confused :cry:
What's vector,scalar, normal to a plane?
:cry: :cry:

 

[crust]

A physics book or geometry book or basic engineering book would have this type of information.

Or **broken link removed**.

 

[ljcox]

Hello,

Is there any great website that i can read on? Me really confused :cry:
What's vector,scalar, normal to a plane?
:cry: :cry:

A vector is a line that has magnitude and direction.

A scalar is a line that has magnitude only.

Normal to a plane means a line that passes through a plane at a right angle (90 degrees) to the plane. The leg of a table is normal to the plane of the table.

I suggest you find a mathemetics or physis book.

Len