Science: Car speed experiment

Yesterday in science we have been learning how to calculate the speed from d/t. we used this to find out the speed of the cars on carmen road using seconds them from that converting them into kilometers. 

How did we do the experiment?

We worked either pair or groups of four to help record the speed using a stopwatch between the distance of two lamposts, (51m) of up to 10 cars, and compare their speeds to finds out if they were speeding or not.

What did we find out?

we found out from the investigation that all of the cars were either doing the speed limit and below. the fastest car had gone 49. 18 km hr-1.  The average time of the cars going past the first post to the second one was 4.24s.

A way to improve the results is to either put lines across the road where the lampposts are or, to stand further away from in-between the two posts so you can get a better view on where the car passes past the first post to the other one.

Some things that could've impacted the speed of the cars are us standing at the fence holding stopwatches timing them. Another impact is the traffic lights ahead at the intersection, this had of most likely impacted their speed causing them to slow down.