<p>A string is wrapped around the rim of a wheel of moment of inertia&nbsp;<span class="equation">\(0.40 kgm^2\)</span>&nbsp;&nbsp;and radius&nbsp; 10cm. The wheel is free to rotate about its axis. Initially the wheel is at rest. The string is now pulled by a force of 40N . The angular velocity of the wheel after 10s&nbsp; is x-rad/s , where x&nbsp; is __________.</p>