In a laboratory demonstration, a constant force is exerted on a uniform disk tangent to the disk's edge. The disk rotates about an axle through its center with negligible friction. 3 a Mark for Review Which of the following changes to the demonstration would increase the angular acceleration of the disk? Replacing the original disk with a ring that has the same mass and radius as the disk Replacing the original disk with a disk that has the same mass and radius but has a density that decreases radially from its center. Replacing the original disk with a disk that has twice the radius but the same mass as the original disk Exerting the force perpendicular to the edge of the disk rather than tangent to the edge