MT-1620 al.2002 Figure 22.2 Representation of modes of spring-mass system (lowest frequency) M L (higher frequency) masses move in opposite direction Paul A Lagace @2001 Unit 22-9φ φ ω MIT - 16.20 Fall, 2002 Figure 22.2 Representation of modes of spring-mass system φ(1) ω1 (lowest frequency) masses move in same direction φ(2) frequency) ω2 (higher masses move in opposite direction Paul A. Lagace © 2001 Unit 22 - 9