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## Homework Statement

A grindstone of radius 4.0m is initialy spinning with an angular speed of 8.0 rad/s. The angular speed is the increased to 10rad/s over the next 4.0 seconds. Assume that the angular acceleration is constant. What is the average angular speed of the grindstone?

## Homework Equations

Please check work...

## The Attempt at a Solution

avg w= (delta theta)/delta T

= (10 rad/s - 8 rad/s) / (4 s-0)

= .5 rad/s

Vt= r * avg w

= 4m * .5 rad/s

= 2 rad/s