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Explain why the frequency of a damped system is lower than that of the equivalent undamped system.

Short Answer

Expert verified
The frequency of a damped system is lower than that of the equivalent undamped system because damping leads to energy dissipation in the system. As frequency is directly related to the energy of the system, a loss in system energy leads to a decrease in frequency.

Step by step solution

01

Understand System Damping

First, we need to understand what damping means in the context of a system. Damping is a phenomenon that causes a decrease in amplitude of the oscillations of an oscillatory system. In a physical system, damping is caused by friction that dissipates energy. In our case, we differentiate between damped and undamped systems.
02

Effect on Frequency

In an undamped system, the energy remains constant and no energy is lost to friction or other non-conservative forces, hence, the frequency of oscillation will remain the same. This is because frequency is directly linked to the energy of the system. In a damped system, the energy of the system decreases due to the work done against the damping forces, and this results in decreased frequency. The system loses energy faster than it acquires it.
03

Conclusion

So, the key point here is the energy dissipation in the damped system. This results in a lower frequency in the damped system as compared to the undamped system, because frequency is directly related to the energy of the system. As more energy is lost to damping in a damped system, the frequency decreases relative to an undamped system where no energy is lost.

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