Determine the maximum speed (m/s) that the cars of the roller coaster can reach along the circular portion AB of the track if the normal component of their acceleration cannot exceed 2.56g where g is...

Determine the maximum speed (m/s) that the cars of the roller coaster can reach along the circular portion AB of the track if the normal component of their acceleration cannot exceed 2.56g where g is the gravitational acceleration. Round off only on the final answer expressed in 3 decimal places.