Question

Cutting speed, when applied to a grinding wheel, is called surface speed. What is the surface speed

Answer 1

Step-by-step explanation:

From the information given,

diameter = 7 inches

We would convert 7 inches to feet. Recall,

12 inches = 1 foot

7 inches = 7/12 foot

diameter = 7/12

The formula for calculating circumference of a circle is

circumference = π x diameter

π = 3.14

thus,

circumference = 3.14 x 7/12 = 21.98/12

Surface speed = circumference in feet x rpm

rpm = 1200

By substituting these values into the formula,

Surface speed = 21.98/12 x 1200

Surface speed = 2198 ft/min