Find the speed of the car

Question

Data from a road trip is shown. The car traveled from t=1hr to t=5hr. Assume the car drove in a straight path. Find the speed of the car from t=1hr to t=5hr.

Time(h) Distance (km) Please show work. Answer in m/s

1 0

2 50

3 150

4 250

5 450

6 450

Answer 1

So If you plot the point that you just gave, you will see that the car is accelerating. So when they are asking for the speed from 1hr to 5hr, what they are really asking, is for the average speed.

v = Δd/Δt = (d(5hr) - d(1hr) )/(5hr-1hr) = (450km - 0)/(4hr) = 112.5 km/hr