A Controversial Stack

This is a stack that was circulated on LinkedIn. It generated quite a bit of interest. Many people tried solving it, and there was disagreement over the solution. The correct solution is included here.

First the problem statement - the distance that must be evaluated is the distance shown with the red question mark.

This is a stack that was circulated on LinkedIn. It generated quite a bit of interest. Many people tried solving it, and there was disagreement over the solution. The correct solution is included here.

First the problem statement - the distance that must be evaluated is the distance shown with the red question mark.

Since it is an assembly with moveable parts, the stack must be done twice - once to get the max result and once to get the min result. The stack path for the max result is shown below. Note that the plunger is grounded against the right side of the square hole.

Here is the stack for the max distance. Note that the column for min distance is crossed out because it is irrelevant.

Here is the stack path for the min distance. Note that the plunger is grounded against the left side of the square hole.

Here is the stack for the min distance. Note that the column for max distance is crossed out because it is irrelevant.