Yesterday we were testing to see how different surfaces affect the speed that a car goes down a ramp.
We tested 4 surfaces: sand paper, carpet, wood and foam.
Watch these videos to see us at work.
This group were testing sand paper. Do you think the car will go quickly or slowly? Why?
Class 4S - Selsdon Primary 
I think the car will go quickly on sand paper because it’s a smoother surface from Sophie’s mum
Did you watch the videos to see if you were right? 🙂
I think the car will go quickly on sand paper because it’s a smoother surface from Sophie’s mum .