Purpose:Show that forces are required to create circular motion.
Description:The apparatus pictured is positioned on a horizontal surface. A small ball bearing (in container at lower left of picture) is blown through the spiral hose, emerging at the right side and moving downward (in the picture), toward one of the five aluminum tube targets. Ask your students to predict: Which of the targets will it hit, and why?
Consider using in conjunction with D1-30 or D1-32 to show the effect in a less complex scenario.