1. The problem statement, all variables and given/known data A 4.0X10 to the power of 4 kg roller coaster starts from rest at point A. Neglecting friction, calculate the potential energy relative to the ground, its kinetic energy, and its speed at points B, C and D. Height A=54m Height B=15m Height C=47m Height D=35m 2. Relevant equations Eg=mg triangle (height)- Triangle=multiply height Ek=1/2mv square 3. The attempt at a solution I found the answer for the total potential energy from A to D which is 5.9X10 to the power of 7 J. I got height, mass, and total potential energy. I need help finding the kinetic energy and the speed for points B, C, and D with a step by step solution.