InterviewSolution
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InterviewSolution
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In the arrangement shown in Fig. 7.100 , mass can be hung from a string with a linear mass density of `2 xx 10^(-3) kg//m` that passes over a light pulley . The string is connected to a vibrator of frequency `700 Hz` and the length of the string between the vibrator and the pulley is `1 m`. If the standing waves are observed , the largest mass to be hung isA. `16 kg`B. `25 kg`C. `32 kg`D. `400 kg` |
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Answer» Correct Answer - D For largest mass , `p = 1` `n = (p)/( 2L) sqrt((T)/(mu))` `700 = (p)/( 2L) sqrt((T)/(mu))` ` m = 2 xx 10^(-3) kg//m , L = 1 m` `T = [ ( 700)^(2) xx 4 xx 1 xx 2 xx 10^(-3)] = 3920 N` Largest mass to be hang , `M_(max) = 3920//9.8 = 400 kg` |
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