A car travels 60 km due north at 40 km h⁻¹ and then turns back, covering 30 km south at 60 km h⁻¹ before stopping.
(i) Determine the magnitude of its average velocity for the whole trip.
(ii) Determine its average speed for the whole trip.
a. Determine the magnitude of its average velocity for the whole trip.
b. Determine its average speed for the whole trip.