# Errata: In Examples 5.5 and 5.6, dynamics in modal form should use z, not x

From FBSwiki

Return to Errata page |

Location: page 145, line 5

On the right hand side of the second equation on the page, showing the dynamics of the coupled spring-mass system in modal coordinates, the state should be instead of .

(Contributed by C. Caramanis, 18 Feb 08)