A fly wheel gains a speed of 680 rpm in 9 sec. Its angular acceleration will be

Options

A. `4 pi rad s ^(-1)`
B. `3pi rad s ^(-1)`
C. `2.5 pi rad s ^(-1)`
D. `pi rad s ^(-1) `

Explanation

To find the angular acceleration of the flywheel, we can follow these steps:

### Step 1: Convert RPM to Revolutions per Second
The flywheel gains a speed of 680 revolutions per minute (rpm). To convert this to revolutions per second (rps), we use the conversion factor:
\[ \text{Revolutions per second} = \frac{\text{Revolutions per minute}}{60} \]
So,
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