how do i do question 1 and 2

Roller Coaster Physics PART A: Roller Coaster Simulation Question How are the gravitational potential energy and the mechanical kinetic energy of a roller coaster related? Procedure 1. Make a table to record answers to the Step 2 questions. Include columns for height (m), total energy (1), gravitational potential energy (J). mechanical kinetic energy (]), and velocity (m/s). 2. A roller coaster with a mass of 800 kg sits stationary at the top of a section of track, 75 m above the ground as shown. When the brake is released. it starts to roll down the track. a) For each height indicated in the diagram, calculate the gravitational potential energy. 75 m b) Assuming that there is no friction. determine the mechanical kinetic 60 m energy and calculate the velocity 45 m for each of the heights of the 30 m roller coaster. (Hint: Recall that 15 m energy is conserved.) c) Use your answers to graph how gravitational potential energy, mechanical kinetic energy, and velocity change as the roller coaster changes height. Use different colours for the graphs. 6 x 105 140 5 x 105 -30 Paten Hal 4 x 105 energy (3 Energy (J) 3 x 105 20 Velocity (- ) Speed (m/s ) 2 x 105 10 energy (J) 1 x 105 75 60 45 30 15 Height (m)