"Solving for a to Make Vector A a Unit Vector

[f24u7]

Homework Statement

If vector A = a( 3.0i + 4.0j) , where a is a constant, determine the value of a that makes A a unit vector.

Homework Equations

The Attempt at a Solution

I thought the answer is 1/5, since a unit vector has a magnitude of one therefore you need to divide it so that the magnitude of the vector equal to one.

 

[ehild]

It is correct. ehild