Read the question and answer titled “Why don’t I fall out when a roller coaster goes upside down?” located at http://2008.myvote.org/www.loc.gov/rr/scitech/mysteries/rollercoaster.html Imagine that you are trying to convince your apprehensive friend John to take his first roller-coaster ride. Explain to John how the roller-coaster engineers use physics to create a safe, yet thrilling ride. Note: In your explanation, be sure to include a discussion of potential energy, kinetic energy, angular momentum, frictional forces, and inertia when analyzing all aspects of the roller-coaster ride.