Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kilometers to the supermarket, which is 5.0 kilometers from her own home. She walked the total distance in 1.5 hours. What were her average speed and average velocity?

Question

radar · Answer

Her average speed would be the total distance (regardless of direction) or in this case 7 kilometers divided by the total time or 7/1.5 which would be 4 2/3 km/hr.

Her average velocity would be the directed distance of 5 km divided by 1.5 (time) or 3 1/3 km directed 36.87 degrees East of North

radar · Answer

per hr should be added after the 3 1/3 km