A) 1 s
B) 2 s
C) 3 s
D) \[\sqrt{\frac{12}{5}}\,s\]
Correct Answer: B
Solution :
When mass 700 gm is removed, the left out mass (500 + 400) gm oscillates with a period of 3 sec \ \[3=t=2\pi \sqrt{\frac{(500+400)}{k}}\] ?...(i) When 500 gm mass is also removed, the left out mass is 400 gm. \ \[{t}'=2\pi \sqrt{\frac{400}{k}}\] ?..(ii) Þ \[\frac{3}{{{t}'}}=\sqrt{\frac{900}{400}}\] Þ \[{t}'=2\sec \]You need to login to perform this action.
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