An object’s velocity was best described by the given option ‘the airplane travelled southwest at 280 mph’.
Answer: Option B
Explanation:
The velocity is defined as the displacement of an object per unit time. The velocity is a vector quantity. So, while describing velocity of an object along with magnitude of change in distance per unit time, the direction of displacement should also be mentioned.
The options (a), (c) and (d) have mentioned the magnitude of change in the position of an object per unit time. Thus, they have described only about speed and not velocity (i.e. not the direction of displacement).
The option (b) is the only one which described the direction of displacement along with rate at which the displacement is changing per unit time. So the option (b) best describes the object’s velocity.
