The stem of a tuning fork is pressed against a table top. Answer the following questions : (i) Would the above action produce any audible sound ? (ii) Does the above action cause the table to set into vibrations? (iii) If the answer above is yes, what type of vibrations are they? (iv) Under what conditions does the above action lead to resonance ?

Q. The stem of a tuning fork is pressed against a table top. Answer the following questions : (i) Would the above action produce any audible sound ? (ii) Does the above action cause the table to set into vibrations? (iii) If the answer above is yes, what type of vibrations are they? (iv) Under what conditions does the above action lead to resonance ?
Ans. (i) Yes, there is an audible sound produced.
(ii) Yes, the table top is set into ‘forced vibrations’ by this.
(iii) The vibrations are forced vibrations.
(iv) Pressing the stem of a vibrating tuning fork against a table top, would ead to resonance if the frequency of the tuning fork equals the natural frequency of oscillations of the table top.

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