An electronic instrument of mass \(10 \mathrm{~kg}\) is mounted on an isolation pad. If the base of the isolation pad is subjected to a shock in the form of a step velocity of \(10 \mathrm{~mm} / \mathrm{s}\), find the stiffness of the isolation pad if the maximum permissible values of deflection and acceleration of the instrument are specified as \(10 \mathrm{~mm}\) and \(20 \mathrm{~g}\), respectively.