Spring Bob -- Spindle - Pointer In the centripetal force/acceleration lab, where you used the equipment shown in the figure etal force ? The hanging mass . The string connecting the cross arm and the bob . The bob. The spring connecting the bob and the spindle . The counterweight . Two disks are rotating in the same direction when they collide and stick together. What is conserved? Kinetic energy Rotation speed Angular momentum O Angular momentum and Kinetic energy In the acceleration of a falling body spark tape lab, you plotted the average velocity versus time. The slope of such a line is: 2*sqrt(g) Omgh 1/(2*sqrt(8))