A uniform circular disc of mass 12kg is held by two identical springs as shown in the figure. When the disc is pressed down slightly and released, it executes SHM with a time period of 2 sec. The force constant of each spring is:
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a
236 Nm–1
b
118.3 Nm–1
c
59.15 Nm–1
d
None of the above
answer is C.
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Detailed Solution
As the two springs are connected in parallel keff = 2k
A uniform circular disc of mass 12kg is held by two identical springs as shown in the figure. When the disc is pressed down slightly and released, it executes SHM with a time period of 2 sec. The force constant of each spring is: