A proposed high-speed train between Houston and Dallas will travel a distance of 386 kilometers in 5.40 103 seconds. What is the average speed of this train
in meters per second?
o 1.40 x 10-2 m/s
o 7.50 x 10-2 m/s
0 71.5 m/s
O 140 m/s

Explanation:

the third answer is correct

71.5m/s

the correct choice is a .

do not post any more test or exam questions on

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day