Simple Harmonic Motion

A simple pendulum with length \(100 \mathrm{~cm}\) and bob of mass \(250 \mathrm{~g}\) is executing S.H.M. of amplitude \(10 \mathrm{~cm}\). The maximum tension in the string is found to be \(\frac{x}{40} \mathrm{~N}\). The value of \(x\) is ___________.