John drove South 120 km at 60 km/h and then East 150 km at 50 km/h. Determinea) the average speed for the whole journey?b) the magnitude of the average velocity for the whole journey?
Answers
Answered by
1
Explanation:
Step-by-step explanation:
South
Time=120/60=2hrs
EAST
Time=150/50=3hrs
Total time=(3+2)=5hrs
Total distance =(120+150)km=270km
Average speed for the whole journey =(270/5) km/hr=54km/hr
Total displacement =_/[(120^2)+(150^2)]km
=192.1km
Therefore net velocity=(192.1/5)hr=38.42km/hr
Similar questions