If the mass of an object increases, how would you expect the net force action on the object to change, assuming the
acceleration is constant?

i already answered it by 34/s

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.