57 262
Assignments Done
Successfully Done
In February 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Mechanics | Relativity Question for martina

Question #15630
sally travels by car from one city to other.she drives for 30.0 min at 80,0 km/h,120 min at 150 km/h ,and 45.0 min at 40.0 km/h and she speeds 15.0 min eating lunch and buying gas.
a:determine the avrage speed for the trip.
b:determine the total distance traveled.
Expert's answer
b). The total distance traveled is

D = 80[km/h]*30[m] + 150[km/h]*120[m] + 40[km/h]*45[m] =
& = 80[km/h]*0.5[h] + 150[km/h]*2[h] + 40[km/h]*0.75[h] =
& = 370 km.

a). The total time elapsed is

T = 30[m] + 120[m] + 45[m] + 15[m] =
& = 0.5[h] + 2[h] + 0.75[h] + 0.25[h] =
& = 3.5 h.

So, the average speed was

V = D/T = 370[km]/3.5[h] ≈ 105.7 km/h.

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!


No comments. Be first!

Leave a comment

Ask Your question