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प्रश्न
State one condition for a body to execute free/natural vibrations.
उत्तर
The free vibrations of a body occur only in vacuum because the presence of medium offer some resistance due to which the amplitude of the vibration does not remain constant, but it continuously decreases.
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संबंधित प्रश्न
Give one reason for Ultrasonic waves use for echo depth sounding purpose.
Why are the Ultrasonic waves are not audible to us?
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[Hint: Natural frequency of vibration of a stretched string is inversely proportional to the radius (or thickness) of string so notes of different frequencies can be produces by vibrating different strings.]
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(b) How did you come to this conclusion.
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