4. Dueling Mass-Spring Systems Consider the four block-and-spring(s) systems shown below. Each block moves on a horizontal, frictionless table. The blocks all have the same mass , and all of the springs are identical and ideal, with spring constant k. At the instant shown, each block is released from rest a distance to the right of its equilibrium position (indicated by the dashed line).

lConsider the four block-and-spring[s} systems shown at right. Each block moves on a horizontal, frictionless table. The blocks all have the same mass m, and all of the springs are identical and ideal, with spring constant It. At the instant shown. each block is released from rest a distance A to the right of its equilibrium position (indicated by the dashed line). In case B, assume that each spring is at its equilibrium length when the block is at its equilibrium position. a. Rank the cases according to magnitude oftne netforce : '__. _ on the block at the instant shown, from largest to I I smallest. (Hint: In case C, how far was the point connecting the two springs displaced when the block was displaced a distance A? ,1 Explain