PhysicsChapter 3: Simple Harmonic Motion
Critical Damping and Suspension
Critical damping
Definition
Critical damping is the minimum damping that allows a displaced system to return to equilibrium as quickly as possible without oscillating.
Underdamped
Depending on damping strength, an oscillator may be: Oscillates while amplitude decreases.
Critically Damped
Returns rapidly to equilibrium without oscillating.
Overdamped
Returns without oscillation but more slowly than a critically damped system. For: **mẍ+bẋ+kx=0 critical damping occurs when: bc = 2√(mk)**
Vehicle Suspension
A vehicle suspension uses: springs; shock absorbers/dampers. The spring supports the vehicle and allows displacement. The damper dissipates unwanted oscillatory energy. The goal is to prevent the vehicle from continuing to bounce after a disturbance. Practical suspension design involves a compromise among stability, comfort, road holding and response.
Formula / Key Relation
**bc=2√(mk)**
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Critical Damping and Suspension
Sticky Notes · Quick Revision
Under → bouncing
- Critical → fast, no bounce
- Over → slow, no bounce
60-second revision
- Critical damping gives the fastest non-oscillatory return in the ideal model.
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