A student drove to the university from her home and noted that the odometer read

Question

A student drove to the university from her home and noted that the odometer reading of her car increased by 18.9km. The trip took 23.4 min.

Randomized Variablesd1 = 18.9 km
t1 = 23.4 min
d2 = 8.8 km
t2 = 7.3 h Part (a) What was her average speed in km/h?
Numeric   : A numeric value is expected and not an expression.
save = __________________________________________


Part (b) If the straight-line distance from her home to the university is 8.8 km in a direction 25 A student drove to the university from her home and noted that the odometer reading of her car increased by 18.9km. The trip took 23.4 min.

Randomized Variablesd1 = 18.9 km
t1 = 23.4 min
d2 = 8.8 km
t2 = 7.3 h Part (a) What was her average speed in km/h?
Numeric   : A numeric value is expected and not an expression.
save = __________________________________________


Part (b) If the straight-line distance from her home to the university is 8.8 km in a direction 25

Explanation / Answer

(a)

The formual for average speed is

average speed = total distance traveled / time taken

      = 18.9 km / 23.4 min (0.0166667 hr/ min) = 48.46 km/h


(b) average velocity = resultant displacement / time taken

average velocity = 8.8 km / 23.4 min (0.0166667 hr/ min) = 22.56 km/h E 25.0

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