Sean Breheny wrote: > If you have a perfectly elastic material, the maximum force happens at > the end of the compression, when the spring is completely compressed. > If the material is perfectly inelastic, but still compresses at a > constant rate for a given force, then the force will be constant > during the deceleration. I agree, but don't see what this has to do with bouncing. Your statement above is a reply to mine where I debunked your assertion that bouncing increases the G force beyond what it takes to get to a stop. Maybe you would have seen this yourself if you had properly snipped and replied to specific points in my post. As it is, your comments don't make sense within the context. > If the spring and the inelastic material > compress at the same rate initially, then the (constant) force of the > inelastic compression will be equal to the force of the spring at some > point early in its compression, which will be less than the force > later in the compression. I don't agree with this, but since it has nothing to do with the point at hand I won't go into it. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist