ch12-p050 - 50. On the verge of breaking, the length of the...

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where m is the mass of the insect and (stress) TA = . Since the volume of the thread remains constant is it is being stretched, we have 00 VA L A L == , or 0 (/) / 3 AALL A . The vertical distance y Δ is 22 0 9 (/ 2 ) (0 / 2 ) 2 44 LL y L Δ= = − = . Thus, the mass of the insect is 0 0 12 2 8 2 2 4 2( /3)(stress)sin 2 (stress) 4 2 (stress) 2s i n 33 / 2 9 4 2(8.00 10 m )(8.20 10 N/m ) 9(9.8 m/s ) 4.21 10 kg AA A Ty m gg g L g θ Δ = = ×× = or 0.421 g. 50. On the verge of breaking, the length of the thread is
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