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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 10 - Oscillation and Waves > If a simple pendulum has a significant amplitude (up to a factor of 1/e of original) only in the period between t=0 s to t=τ s, then τ may be called the average life of the pendulum. When the spherical Bob of the pendulum suffers a retardation (due to viscous drag) proportional to it’s velocity, with b as the constant of proportionality, the average life time of the pendulum is (assuming damping is small) in seconds

If a simple pendulum has a significant amplitude (up to a factor of 1/e of original) only in the period between t=0 s to t=τ s, then τ may be called the average life of the pendulum. When the spherical Bob of the pendulum suffers a retardation (due to viscous drag) proportional to it’s velocity, with b as the constant of proportionality, the average life time of the pendulum is (assuming damping is small) in seconds

If a simple pendulum has a significant amplitude (up to a factor of 1/e of original) only in the period between t=0 s to t=τ s the average life time of the pendulum is (assuming damping is small) in seconds then τ may be called the average life of the pendulum. When the spherical Bob of the pendulum suffers a retardation (due to viscous drag) proportional to it's velocity with b as the constant of proportionality