77 945
Assignments Done
98,5%
Successfully Done
In August 2019

# Answer to Question #14911 in Mechanics | Relativity for sydney

Question #14911
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 50.0 min at 95.0 km/h, 7.0 min at 80 km/h, and 50.0 min at 55.0 km/h, and spends 30.0 min eating lunch and buying gas. '

a. determine the average speed for the trip
b.Determine the distance between the initial and final cities along this route.
Expert's answer
a. determine the average speed for the trip

The total distance traveled is

L = 95/60[km/m]*50[m] + 80/60[km/m]*7[m] + 55/60[km/m]*50[m] = 134+1/3 [km].

The total time elapsed is

T = 50[m] + 7[m] + +50[m] + 30[m] = 137 [m].

So, the average speed for the trip was

V = L/T = (134+1/3)[km] / (137)[m] &asymp; 0.9805 [km/m] = 58.83 [km/h].
&
b.Determine the distance between the initial and final cities along this route.

The distance between the initial and final cities is L = 134+1/3 [km].

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

#### Comments

No comments. Be first!

Submit