Question

What is the angular velocity (in rad/s) of a fly wheel making 300 r.p.m?

• A. $600\pi$
• B. $20\pi$
• C. $10\pi$
• D. 30

Answer 1

The correct option is C $10\pi$

We know that,
angular velocity in r.p.m (revolution per minute (N)) and radians per second ($\omega$) are related by
$\omega =\frac{2\pi \text{N}}{60}=300\times \frac{2\pi }{60}=10\pi \text{rad/s}$

($\because$1 revolution corresponds to $2\pi \text{radians}$)