Simple Harmonic Motion

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, \(\mathrm{g}: 10 \mathrm{~ms}^{-2}\)]