Free and forced oscillations and resonance Quiz
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5 questions, one answer each
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1. A mass on a spring is pulled down and released. At what frequency does it oscillate?
- A. The driving frequency
- B. Its natural frequency
- C. Twice its natural frequency
- D. A frequency that depends on the amplitude
2. A car panel rattles loudly at only one engine speed. This is because:
- A. the panel has no damping
- B. the driving frequency equals the natural frequency of the panel
- C. the engine force is greatest at that speed
- D. the panel is stiffest at that speed
3. How does increasing damping change the resonance curve?
- A. A taller, narrower peak
- B. A lower, flatter and broader peak
- C. A peak at a much higher frequency
- D. No change
4. In Core Practical 16 a graph of 1/f² against m has gradient 2.0 s² kg⁻¹. An unknown mass resonates at 1.0 Hz. What is its mass?
- A. 0.25 kg
- B. 0.50 kg
- C. 1.0 kg
- D. 2.0 kg
5. A forced oscillation continues at the:
- A. natural frequency
- B. driving frequency
- C. resonant amplitude
- D. damped frequency