# A grinding wheel has a diameter of 200mm. If it rotates at 2100 rev/min. What is the circumferential speed?

##### 2 Answers

Jun 9, 2018

I got

#### Explanation:

We know that the wheel rotates at:

this corresponds to (in radiand per second):

now, the linear speed

where I changed the diameter into meters and divided by

Jun 9, 2018

#### Explanation:

Frequency of wheel is

Angular frequency of wheel is

Circumferential speed (