# Find a unit vector in the direction of the given vector v = (1, 3).

Vectors are quantities with both magnitude and direction. Vectors are used to represent quantities in physics, such as velocity, acceleration, force, or torque.

## Answer: The unit vector for v = (1, 3) will be (1/√10, 3/√10).

**Explanation:**

A unit vector is a vector with a magnitude of 1. It is also known as a direction vector.

For example, vector v = (2, 4) is not a unit vector, because its magnitude is not equal to 1, i.e., |v| = √(2^{2 }+ 4^{2}) ≠ 1. Any vector can become a unit vector by dividing it by the magnitude of the given vector.

To calculate the unit vector for v = (1, 3) we need to divide the vector by its magnitude.

Magnitude of the vector v = (1, 3) is:

|v| = √(1^{2} + 3^{2}) = √(10)

Hence unit vector is (1, 3)/√10 or (1/√10, 3/√10)