Procedure Part 2

1. Determine the average acceleration for at least 1 other types of ball (of different size or mass) and for a ("Hot Wheel") cart. Summarize in a table all the accelerations found with the balls/carts used. Include a rough measurement of size and mass as well as description.

Notice the accelerations are different. Which had the greatest and which had the least acceleration? Can you hypothesize as to why the accelerations are different? Does what you found here not contradict what Galileo stated?

2. Roll a ball up the incline so that it slows to a stop at the top and then rolls back down without coming within a half meter of the Motion Detector. Compare the up and down motion to the down only motion that you examined in the lab. Is the acceleration the same during the whole motion? Is the velocity always the same sign? How could you change the coordinate system of your experiment so the acceleration changes sign?