Answer:
[tex]v_{avg} =[/tex] 355 m/s
Explanation:
Distance = 605 km
Initial speed = [tex]v_{i}[/tex] = 284 m/s
Final velocity = [tex]v_{f}[/tex] = 426 m/s
Average speed = ?
There is two method two find average speed. In first method, using 3rd equation of motion, we find acceleration.
[tex]2as = v_{f}^{2}+v_{i}^{2}[/tex]
Then using first equation of motion, we find time
[tex]v_{f} = v_{i}+at[/tex]
Then using the formula of average velocity, we find average velocity
[tex]v_{avg}=\frac{total-distance}{total-time}[/tex]
Second method is very simple
[tex]v_{avg}=\frac{v_{f}+v_{i} }{2}[/tex]
[tex]v_{avg}=\frac{426+284}{2}[/tex]
[tex]v_{avg} =[/tex] 355 m/s
