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[" A plank with a small block on top of it is under going vertical SHM.Its period is "2" sec.The minimum "],[" amplitude at which the block will separate from plank is: "],[[" (A) "(dQ)/(pi^(2))" with "," (B) "(pi^(2))/(10)," (C) "(20)/(pi^(2))," (D) "(pi)/(10)]]

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