Questions
Look at this distance-time graph and answer the following questions.
Question
How far did the vehicle travel in the first 4 seconds?
30 m
Question
What was the speed of the vehicle over the first 4 seconds?
distance moved = (30 m – 0 m) = 30 m
time taken = (4 s – 0 s) = 4 s
speed = gradient of distance-time graph = distance moved ÷ time taken
speed = 30 m ÷ 4 s = 7.5 m/s
Question
How long was the vehicle stationary?
The distance moved remains at 30 m between 4 and 8 seconds. The vehicle was stationary for a total of 4 seconds.
Question
What was the average speed of the vehicle over the journey?
distance moved = (40 m – 0 m) = 40 m
time taken = (10 s – 0 s) = 10 s
average speed = total distance moved ÷ time taken = 40 m ÷ 10 s = 4 m/s