. For each of the runs, test the predictions of momentum conservation in the manner outlined above.  Did you find that, within experimental error, momentum is conserved? State your results in the form of a percentage.

2. Carefully review the way in which the data collected was interpreted. In particular, for a set of graphs associated with one run, relate the graph features with events in the experiment, including the actual collision, but also the time during which the cars are being pushed towards each other. Sketch the graphs in your notebook and mark the relevant points.

3. Carefully review the way in which the data collected was interpreted. You should point out how the algebraic signs of specific momentum values were determined.

4. Discuss any relevant sources of error.