the same frequency as its natural frequency larger and larger a frequency greater than its natural frequency to a different frequency a frequency lower than its natural frequency decreases in amplitude has no fixed frequency Every object has natural frequencies of oscillation with which they will respond when deflected from equilibrium. The marching soldiers appear to have been marching at a pace such that their stomping boots drove the oscillation of the bridge at Pushing an oscillating system at the same rate as it responds is like pushing a child on a swing at just the right time to drive the oscillations If the soldiers break step, the total driving force amplitude oscillations. and will not drive the bridge into large-

the same frequency as its natural frequency larger and larger a frequency greater than its natural frequency to a different frequency a frequency lower than its natural frequency decreases in amplitude has no fixed frequency Every object has natural frequencies of oscillation with which they will respond when deflected from equilibrium. The marching soldiers appear to have been marching at a pace such that their stomping boots drove the oscillation of the bridge at Pushing an oscillating system at the same rate as it responds is like pushing a child on a swing at just the right time to drive the oscillations If the soldiers break step, the total driving force amplitude oscillations. and will not drive the bridge into large-