Engineering Statics

B-21


Find the unit vector associated with the vector S = i + 3j + 5k

The magnitude of the vector has to be found since the unit 
vector is the vector divided by its magnitude.
The magnitude of the vector is found by taking the square root of 
the sum of the squares of the components of the vector <B><I>S</I></B>.
Each component of the vector is divided by the magnitude of the vector.
The unit vector is a vector in the direction of <B><I>P</I></B> but of magnitude 1.