Describe the potential energy and kinetic energy at each position of the
roller coaster car. Use these questions to help you.
1.Where is potential energy at its maximum?
2,Where is kinetic energy at its maximum?
3.Where is potential energy increasing and decreasing?
4.Where is kinetic energy increasing and decreasing?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c