Question

John drove South 120 km at 60 km/h and then East 150 km at 50 km/h. Determine
a) the average speed for the whole journey?
b) the magnitude of the average velocity for the whole journey?​

Answer 1

Answer:

a) 198 ms-1 I hope I will help u.

Answer 2

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