This is a 4 page lab designed for 8th grade physical science class. Students use 3 toy cars (must move at a constant speed) to calculate speed. Students measure time with stopwatches at each meter over a five meter straight course. They then take a class average for time and plot each car on a graph (Distance Vs. Time, graph is provided. They then see that each car has its own slope. Faster cars have steeper slopes. Students then calculate speed in meters/sec and then convert to cm/s and mm/s. In addition, students also interpolate a 4th car position on the graph. Extrapolation is also used in this lab. Five short answer questions and four multiple choice questions. I used this lab for five years and made it better each year.
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