Final answer:
The object's motion is described by a vector because both magnitude and direction are provided. The object exhibits accelerated motion due to the change in velocity over time.
Step-by-step explanation:
The motion described is an object initially moving south at 10 m/s and then after minutes of travel, changing its velocity to 15 m/s. This describes an accelerated motion because there is a change in velocity. Acceleration is a vector quantity since it involves a change in velocity which is also a vector, consisting of both a magnitude and a direction. Additionally, movement to the south can be represented as a negative in some coordinate systems, while northward movement is positive. Regarding whether the described motion is a scalar or vector, we need to consider the properties of each. The initial description provided includes both magnitude (10 m/s and then 15 m/s) and direction (south), which indicates that the object's motion is described by a vector. On the other hand, if we were only talking about the object's speed (without direction), then we'd be discussing a scalar quantity.