Find the magnitude of the vector a and the smallest positive angle θ from the positive x-axis to the vector op that corresponds to a. a=0,-5.

|a| = 5

θ = 90°

Step-by-step explanation:

The position vector of a is OP.

The magnitude of a vector is square root of of sum of square of x and y component.

x-component of vector a = 0

y-component of vector b = -5

The smallest positive angle θ from the positive x-axis to the vector OP

Smallest possible angle is 90° with positive direction of x-axis.

Hence, the magnitude of vector a is 5 and smallest possible angle is 90°