Question

A private aviation helicopter's main rotor blades rotate at approximately

450 rpm. What is the angular speed of the blades of the rotor in SI units?

Answer 1

Answer: 7.5 rev/s

Step-by-step explanation:

We are given the angular velocity
`\omega` a helicopter's main rotor blades:

`\omega=450 rpm=450 (rev)/(min)`

However, we are asked to express this
`\omega` in the International Systrm (SI) units. In this sense, the SI unit for time is second (
`s`):

`\omega=450 (rev)/(min) (1 min)/(60 s)`

`\omega=7.5 (rev)/(s)`