Answer
$w=2.078$ radian per sec
Work Step by Step
Step 1: The formula to be used here is $w=\frac{\theta}{t}$.
Step 2: After substituting the values of $\theta$ and $t$ provided by the question into this formula, the equation becomes $w=\frac{5.225}{2.515}$
Step 3: Solving, $w=2.078$ radian per second.