AP EAPCET 07-Jul-2022 Shift 2 Paper

A block of mass 100g is connected to an elastic spring of spring constant 450Nm−1 oscillates vertically. The block-spring system is in viscous surrounding medium with a damping constant 69.3gs−1. The time in which the amplitude of oscillations drop to half of its initial value.
[ take ln‌2=0.693]