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AP Physics 1
Unit 7: Oscillations
7.6 Driven Harmonic Motion and Resonance
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Driven harmonic motion causes systems to oscillate at their natural frequency.
False
What determines the actual oscillation frequency of a driven system?
Driving frequency
Resonance occurs when the driving frequency matches the system's
natural frequency
.
Why is the amplitude of oscillation greatest at resonance?
Driving force is in sync
Steady-state motion occurs when the system oscillates at the
driving frequency
.
True
During steady-state motion, the system is synchronized with the
driving force
.
The driving frequency is the frequency of the
external
force applied to an oscillating system.
True
What is a driving force in the context of oscillating systems?
External periodic force
What determines the actual oscillation frequency of a driven system?
Driving frequency
Resonance occurs when the driving frequency matches the natural
frequency
When the driving frequency is less than the natural frequency, the amplitude of oscillation is relatively
low
Steady-state motion occurs when the system oscillates at the
driving frequency
.
True
What is the natural frequency of an oscillating system?
Frequency without external forces
The
natural frequency
determines how the system vibrates on its own.
True
At resonance, the amplitude of oscillation is
maximized
What is driven harmonic motion in an oscillating system?
Motion under external force
What is the natural frequency of a system?
Frequency without external forces
The driving frequency determines the actual oscillation frequency of the
driven system
.
True
Resonance occurs when the driving frequency matches the
natural
What type of motion describes the initial response of an oscillating system to a driving force?
Transient motion
Steady-state motion occurs when an oscillating system reaches equilibrium with the
driving force
.
True
The forced frequency is the frequency at which an external periodic force is
applied
Resonance occurs when the driving frequency matches the natural frequency of the system.
True
Resonance occurs when the driving frequency equals the
natural
What is maximized in resonant systems when the driving frequency matches the natural frequency?
Energy transfer
Musical instruments like guitars exploit resonance to amplify sound.
True
When the driving frequency matches the natural frequency of the system,
resonance
Resonance occurs when the driving force is in sync with the
system's
natural vibrations
True
The frequency of the external driving force is called the
driving
frequency.
The driving frequency determines the system's actual oscillation frequency, unlike the
natural
frequency.
What type of motion occurs after the initial transient phase in driven harmonic motion?
Steady-state motion
Match the frequency type with its definition:
Natural Frequency ↔️ The frequency a system vibrates at without external force
Forced Frequency ↔️ The frequency imposed by an external periodic force
When the driving frequency matches the natural frequency of an oscillating system, the system's
amplitude
of oscillation is maximized.
The resonance frequency is equal to the
natural frequency
of the system.
True
What determines the amplitude of oscillation in a driven oscillating system?
Driving frequency and natural frequency
Order the following relationships between driving frequency and amplitude of oscillation during resonance:
1️⃣ Driving frequency < Natural frequency: Relatively low amplitude
2️⃣ Driving frequency = Natural frequency: Maximum amplitude
3️⃣ Driving frequency > Natural frequency: Relatively low amplitude
Why is energy transfer maximized in resonant systems?
Driving force aligns with natural vibrations
Efficient energy transfer in resonant systems is due to the driving force being in sync with the system's
natural vibrations
.
True
What is the role of the driving force in resonance?
Adds energy to the system
How is resonance used in earthquake engineering?
Avoid resonance during earthquakes
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