1. The problem statement, all variables and given/known data Three springs, A (spring constant k), B (spring constant 2k) and C (spring constant 4k) are serially joined and are vertically hanged from a ceiling with spring A at the top, spring B in the middle & spring C at the bottom. All three have the same relaxed length of L. The bottom end of spring C is then tied(?) to a table which is tall enough that all three springs are in their relaxed length (the distance between the ceiling & the table's surface is 3L). If a weight of mass M is put between spring A and spring B, what is 1. the displacement, x of springs B and C, 2. the force, F applied on the spots where springs A and C are tied to (ceiling & table surface)? Gravitational force is g, no specific numbers. All springs are massless. 2. Relevant equations mg = -kx F = mg 3. The attempt at a solution Displacement of spring B mg = 2kx' x' = mg/2k Displacement of spring C mg = -4kx" 2kx' = -4kx" x" = -x'/2 Wow, I honestly don't know where I'm going with this.