Question

What is the angular speed, in rad/s, of a flywheel turning at 813.0 rpm?

Answer 1

To convert it:-

813 × 2π/60

→ 85.14 rad/s

Answer 2

Given:

Angular speed is 813 rpm.

To find:

Value of angular speed in radian/sec unit ?

Calculation:

• 'rpm' means revolutions per minute.

• So, in order to convert revolutions to radians , multiply with 2π.

• And in order to convert minutes to second (in denominator) , divide with 60.

$813 \: rpm$

$= 813 \times \dfrac{2\pi}{60}$

$= 27.1 \times \pi$

$= 85.13 \: rad/sec$

So, angular speed is 85.13 rad/sec.