I am Prateek Srivastava and trying to know the motion study of two springs attached to a block in opp. direction. Other ends of springs are fixed. When block moves to and fro one spring will contrast and other will expand and it will go on. I have built two dynamic compression springs, mate them with a block in middle and two blocks at other ends of respective springs, so when i am trying for a motion study using motor option fr the oscillation motion of middle block, it is not working.