PHY221 Ch9: Work and PE. Recall main points: W non -conservative = E mechanical Force from potential energy: Discussion and examples Foundation: work energy theorem: W = K Example of use of both energy and NII: Rollercoaster. PHY221 Ch9: Work and PE. Main Points.
Problem: Start at top (y=h) at v =0. Loop-the-loop of radius R from ground; find max R for not falling off car w/out seatbelt.
Problem: Block down frictionless incline of height h into surface with kinetic friction mk. Distance d to stop block.