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Free and Forced Vibrations

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Questions and Answers

What causes free vibrations?

An external periodic force.
Disturbance from an equilibrium position. (correct)
Resonance with an external frequency.
A constant applied force.

What determines the frequency of free vibrations?

The color of the vibrating body.
The body's physical properties. (correct)
The magnitude of the initial disturbance.
The amplitude of the vibration.

When does resonance occur?

When the external force frequency matches the natural frequency. (correct)
During free vibrations in a vacuum.
When the applied frequency is twice the natural frequency.
When damping forces are maximized.

What is required to produce forced vibrations?

<p>An external periodic force. (A)</p> Signup and view all the answers

Under what condition does the energy of a freely vibrating body remain constant?

<p>In the absence of friction and air resistance. (B)</p> Signup and view all the answers

Flashcards

Free Vibrations

Vibrations occurring when a body is disturbed from equilibrium and released.

Natural Frequency

The frequency at which a body naturally vibrates when disturbed.

Forced Vibrations

Vibrations caused by a continuously applied external force.

Resonance

A phenomenon where amplitude increases greatly when the driving frequency matches the natural frequency.

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Resonance Condition

Condition when external force frequency equals the natural frequency.