Physics · 2015
JEE Main · 11 April 2015, Shift 1 · Q12
A pendulum with time period of 1 s is losing energy due to damping. At certain time its energy is 45 J. If after completing 15 oscillations, its…
A pendulum with time period of $\displaystyle 1 s$ is losing energy due to damping. At certain time its energy is $\displaystyle 45$ J. If after completing $\displaystyle 15$ oscillations, its energy has become $\displaystyle 15$ J, its damping constant (in $\displaystyle s^{-1}$ ) is :
Official answer
(2)
$\displaystyle \frac{1}{15} \ln 3$
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JEE Main 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.