The bob of a pendulum was released from a horizontal position. The length of the pendulum is $10 \mathrm{~m}$. If it dissipates $10 \%$ of its initial energy against air resistance, the speed with which the bob arrives at the lowest point is : [Use, $\mathrm{g}: 10 \mathrm{~ms}^{-2}$ ]
  • A$6 \sqrt{5} \mathrm{~ms}^{-1}$
  • B $5 \sqrt{6} \mathrm{~ms}^{-1}$
  • C$5 \sqrt{5} \mathrm{~ms}^{-1}$
  • D $2 \sqrt{5} \mathrm{~ms}^{-1}$
JEE MAIN 2024, Diffcult
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