Question

3 A police patrol driver sees a car that seems to be travelling too fast on a motorway (freeway). He times the car over a distance of 3.0 km. The car takes 96 s to travel this distance. a The speed limit on the motorway is 120 km h-¹. Calculate the distance a car would travel at 120 km h¹ in one minute. b Calculate the distance a car would travel at 1.20 km hr¹in 1 s. c Calculate the average speed of the car, in m s². d Compare the car's actual speed with the speed limit. Was the car travelling above or below the speed limit?​

Answer 1

b. The formula that we can use to calculate the distance s that an object will travel in a given time t is

s (distance) = v (speed) x t (time)

where v is in km/h and s is in km.

To calculate the distance a car would travel at 1.20 km/h in 1 s, we can plug the values in:

s = 1.20 km/h x 1 s

s = 0.12 km

So, the car would travel 0.12 km or 120 meters at a speed of 1.20 km/h in 1 s.