A wheel is rotating at 900 r.p.m about its axis. When the power is cut off, it comes to rest in 1 minute. The angular retardatin in radian/`s^(2)` is `(pi)/x`. Find the value of x.

Explanation

To solve the problem, we need to find the angular retardation of the wheel when it comes to rest after the power is cut off. Let's break down the steps:

### Step 1: Convert the initial angular velocity from r.p.m to rad/s
The wheel is rotating at 900 rotations per minute (r.p.m). To convert this to radians per second (rad/s), we use the conversion factor:

\[ \text{Angular velocity} (\omega) = \text{r.p.m} \times \frac{2\pi \text{ rad}}{1 \text{ rotation}} \times \frac{1 \text{ min}}{60 \text{ s}} \]
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