1. The problem statement, all variables and given/known data A roller coaster travels on a frictionless track as shown in the figure. (a) If the speed of the roller coaster at Point A is 5.0 m/s, what is its speed at Point B? (b) Will it reach Point C? (c) What speed at Point A is required for the roller coaster to reach Point C? Please view the attached figure. In case the image is too blury, the height of Point A = 5.0 meters, and the height of Point C = 8.0 meters. 2. Relevant equations KE = 0.5*m*v^2 PE = m*g*y, where y = vertical position 3. The attempt at a solution KE = PE 0.5*m*v^2 = m*g*y mass cancels 0.5*v^2 = g*y v = √(2*g*y) What confuses me is what to do with the starting speed at Point A, 5.0 m/s. If the velocity at the top was zero, then the problem would be relatively straightforward. Where do I go from here? Thanks in advance!