A struck guitar string produces a note whose loudness gradually decreases even though…
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A struck guitar string produces a note whose loudness gradually decreases even though no extra force is applied after plucking. Which of the following statements best explains this behaviour?
(a) The amplitude remains constant because the string vibrates at its natural frequency.
(b) The amplitude decreases because resistive forces remove energy from the system.
(c) The loudness falls because the frequency of vibration gradually drops below its original value.
(d) The sound fades as waves emitted from different parts of the string interfere destructively and cancel out.