A block of mass 0.1 kg is connected to an elastic spring of spring constant 640" Nm"^(-1) and oscillates in a medium of constant 10^(-2)" kg s"^(-1). The system dissipates its energy gradually. The time taken for its mechanical energy of vibration to drop to half of its initial value, is closest to :

A block of mass 0.1 kg is connected to an elastic spring of spring con

1.	A block of mass 0.1 kg is connected to an elastic spring of spring constant 640" Nm"^(-1) and oscillates in a medium of constant 10^(-2)" kg s"^(-1). The system dissipates its energy gradually. The time taken for its mechanical energy of vibration to drop to half of its initial value, is closest to :
Answer» 2 s 3.5 s 5 s 7 s Answer :B

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