Question

The blades of an aeroplane propeller are rotating at the rate of $600$ revolutions per minute its angular velocity is

• A. $10\pi rad/s$
• B. $20\pi rad/s$
• C. $2\pi rad/s$
• D. $\pi rad/s$

Answer 1

Answer: (B)

$20\pi rad/s$

Frequency of the propeller $f=600$ rpm $=\frac{600}{60}=10$ rps

$\therefore$ Angular velocity $w=2\pi f=2\pi \left(10\right)=20\pi$ rad/s