new_contents: def find_fianl_velocity(v0, dh, dist): # for small changes in V
      g = 9.81 #accelertion due to gravity, m/s
      drag_c = .6 #drag coefficient of human body
      cross_a = .68 #Cross-sectional area of human body
      mass = 80 #kg
      frict_c = .03 #Coefficient of friction
      a = g - 1.225 * drag_c * cross_a * v0 ** 2 / (2 * mass) - g * c
          # Total Acceleration = grav, air resistance, rolling friction resistance
          # Assumes final velocity causes about the amount of air resistance as
          #   inital velocity TODO: Make more classically perfect by integrating
      return (2 * a * dist + v0 ** 2)
  
subject: Add acceleration formula