A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 187 ft. If we approximate the track to be completely flat and the racecar is traveling at a constant 62.00 mph around the turn, what is the racecar\'s centripetal (radial) acceleration? Convert this result to SI units. What is the force responsible for the centripetal acceleration in this case?