I am going brain dead on a rather simple question. Appreciate some help. A mass of 4.5 KG attatched to a horizontal spring of constan 75 KN/m is compressed 0.4 m from Equilibirium and then a loose mass of 2.5 KG is placed in front of it . IF the mass is now released: 1. at what point do the masses separate. 2. How far apart are they when the 4.5 KG mass stops? Assume no friction.