A block whose mass is \(1\) kg is fastened to a spring. The spring has a spring constant of \(50~\text{Nm}^{-1}\)${\mathrm{}}^{}$. The block is pulled to a distance \(x = 10\) cm from its equilibrium position at \(x = 0\) on a frictionless surface from rest at \(t=0.\) The kinetic energy of the block when it is \(5\) cm away from the mean position is:
1. \(1.9~\text{J}\)
2. \(0.29~\text{J}\)
3. \(0.19~\text{J}\)
4. \(2.9~\text{J}\)

A block is fastened to a spring. The spring has a spring constant of \(50\) N m^-1. The block is pulled to a distance \(x = 10\) cm from its equilibrium position at \(x =0\) on a frictionless surface from rest at \(t=0.\) The potential and total energies of the block when it is \(5\) cm away from the mean position respectively are:
1. \(0.0625\) J and \(0.25 \) J
2. \(0.625\) J and \(0.25\) J
3. \(0.0325\) J and \(0.35\) J
4. \(0.065\) J and \(3.5 \) J