Hi, I need to calculate the speed for an index plunger to fully release. The basic setup is simple. It is pretty much identical to a collapsible loft ladder......Within a sliding mechanism, we have a fixed plate and a sliding plate. A plunger is housed within the fixed plate. This plunger is compressed as it is pressed against the sliding plate. The sliding plate has a through hole in it. As this sliding plate slides across the fixed plate the through hole will at some point align with the spring plunger. At which the plunger will be free to release. The challenge is the moving plate moves very very quickly. I need to ensure that the spring plunger can release quickly enough to guarantee the plunger engages into the sliding plate. Can anybody suggest how I can calculate the speed for the plunger to release. Thanks.