<p>At a given point of time the value of displacement of a simple harmonic oscillator is given as y = A cos<span class="equation">\((30^0)\)</span> . If amplitude is&nbsp; 40 cm and kinetic energy at that time is 200 J&nbsp; , the value of force constant is 1.0&nbsp;<span class="equation">\(\times 10^xNm^{-1}\)</span>​​​​​​​ . The value of&nbsp; x is ____________.</p>