Question

A car travels 30.0 km to the south and then turns around and travels 20.0 km to the north in 1.5 hours time. What is the car's total displacement? What is the car's average velocity?

Answer 1

Total displacement =10
Average velocity =6.7

Answer 2

10 km, 6.67 km/h

Step-by-step explanation:

The minimum distance between two points is called displacement. It is a vector quantity.

The average velocity is defined as the ratio of total displacement covered to the total time taken. It is also a vector quantity.

Total displacement = 30 - 20 = 10 km south

Total time = 1.5 hour

Average velocity = total displacement / total time

Average velocity = 10 / 1.5 = 6.67 km/h