Measuring the height of the ramp

This week, in science we investigated 'Friction'. We explored how high a ramp was before the car moved. We recorded our results in a chart, taking care to complete the test twice to avoid any anomalies. 

We concluded that the bubble wrap produced the most friction, as the car didn't move until the ramp was lifted very high. Everyone took care to accurately measure the height and ensure the test was as fair as possible.