Question

You drive in a straight line at 18.0 m/s m / s for 10.0 miles, then at 34.0 m/s m / s for another 10.0 miles.

Answer 1

1 mile = 1609 meters

10 miles = 16090 meters

16090m/(24.0m/s) = 670s

16090m/(30.0m/s) = 536s

Average Speed = Total distance/Elapsed time

Average Speed = [16090m(2)]/(670s+536s) = 32080m/1206s = 26.7m/s

(a) The car's average speed is less than 27.0m/s

(b) The car's average speed is 26.7m/s

Step-by-step explanation:

1 mile = 1609 meters

10 miles = 16090 meters

16090m/(24.0m/s) = 670s

16090m/(30.0m/s) = 536s

Average Speed = Total distance/Elapsed time

Average Speed = [16090m(2)]/(670s+536s) = 32080m/1206s = 26.7m/s

(a) The car's average speed is less than 27.0m/s

(b) The car's average speed is 26.7m/s