The roller coaster starts from rest at A and its speed increases at 0-6 0.06s, in m/sce, wheres is the displacement along its trajoctory (soc Figure 2). If this trajectory is expressed by 100 determine the magnitude of its acceleration when it reaches B where 8 = 40m. N.B. The analytic expression of radius of curvature is not given or nocessary to solve the problem XX 30 m