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 card total displacement ? What is the cars average velocity?

Answer 1

Displacement = distance and direction from start-point to end-point.

That's 10km south.

Velocity = displacement / time

That's 6.67... km/hr south.