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

The linear speed L of a grinding wheel in feet per minute-example-1
User Urag
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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

User SteveSt
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