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## Homework Statement

2 equal masses are joined together by a spring of stiffness k. each of the masses is then connected to a wall with an identical spring. derive the equations of motion in matrix form. (a diagam has 2 masses with x1 on top of the first mass and x2 on top of the second.)

## Homework Equations

hooke's law: F = kx

## The Attempt at a Solution

mass 1:

mx1'' = F(x2 - x1) - Fx1

mx2'' = Fx2 - F(x2 - x1)

^ are these correct?