if a simple pendulam has significant amplitude ( upto a factor of 1/e of original) only in the period between t=0 to t=τ second,then may be called the average life of pendulum.when the spherical bob of the pendulum retardation (due to viscous drag) proportional to its velocity with b as the constant of proportionality , the average time of the pendulum is (assuming damping is small) in seconds-

subodh , 6 Years ago

Grade 11