a student places a block on a disk, and the edge of the disk makes one revolution in a constant time interval △t. a force probe is attached to the block and the center of the disk, as shown above. in an experiment, a student measures the centripetal force exerted on the block when placed at various distances from the center of the disc while the tangential speed of the edge of the disc remains constant. which of the following graphs shows the centripetal force exerted on the block as a function of its distance from the center of the disk?