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    Introduction

    Assumptions in dynamics

    Rigid Deformable

    No motion

    \( \sum \vec{F} = 0 \)

    \( \sum \vec{M} = 0 \)

    Statics Solid mechanics

    Motion

    \( \sum \vec{F} \neq 0 \)

    \( \sum \vec{M} \neq 0 \)

    Dynamics Vibration, FEA, robotics, etc.