Roller Coaster he 500kg roller coaster shown in the figure starts at point A with speed of 2.0 m/s. The heights of the different points along the path are shown on the figure. 2 1 point Ignoring non-conservative forces, calculate the speed of the coaster at point B. Type your answer... 25.0 m 3.00 m 4.00 m 12.0 m 3 1 point If non-conservative forces actually do -20 kJ of work on the roller coaster as it moves from point A to point B, calculate the speed of the roller coaster at point B. Type your answer...