Question

The linear speed L of a grinding wheel in feet per minute

Answer 1

Step-by-step explanation:

We are told to find the rotational speed needed for a 6.0 -nch grinding wheel to generate a linear speed of 4100fpm

To do so, we will use the given formula:

`L=(\pi dr)/(12)`

So, we are to solve for r, given that

`\begin{gathered} d=6.0 \\ L=4100fpm \end{gathered}`

So, if we make r the subject of the formula

`r=(12L)/(\pi d)`

Thus

`r=(12*4100)/(\pi*6)=2610.14rpm`

If we are to round up our answer to the nearest hundred, we will have the rotational speed to be 2600 rpm