<p>A body of mass 3 kg is under a force, which causes a displacement in it is given by&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>S</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mfrac><msup><mi>t</mi><mn>2</mn></msup><mn>4</mn></mfrac></math>&nbsp;(in m). Find the work done (in J) by the force in first 2 seconds.</p>