(a) Click on [b]START[/b] and play the animation several times. Describe in words how the speed of the ball changes on its path![br][br](b) Click on the check box "speed". Play the animation. What is displayed in the coordinate system?[br][br](c) Solve using the representation in the coordinate system: At which position do you find the maximum speed? At which position do you find the minimum speed? How does the speed change while the ball is moving?[br][br](d) Compare this situation to the previous applet "Hill". Summarize your considerations!