Example 8.2 The odometer of a car reads
2000 km at the start of a trip and
2400 km at the end of the trip. If the
trip took 8 h, calculate the average
speed of the car in km h- and m s.
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Answer:
50km h-¹ or 13.9 m s-¹
Step-by-step explanation:
distance covered by the car,
s=2400 km – 2000 km = 400 km
Time elapsed, t = 8 h
Average speed of the car is
Vav = s/t = 400km/8
=50 km h-¹
50 km/h x 1000m / 1km x 1h/3600s
= 13.9m s-¹
The average speed of the car is 50 km h-¹ or 13.9 m s-¹
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