What is the average angular deceleration of the rear wheel?

[johnojohno]

Homework Statement

A cyclist traveling at 8.8725 mps, brakes coming to a halt in 100m, what is the average angular deceleration of the rear wheel. The diameter of the wheel is 650mm

The Attempt at a Solution

(v² - u²)/2s = a

(0-8.8725²)/2x100 = -0.393 mps

 

[cupid.callin]

.393 is acceleration not angular acceleration

angular acceleration, α = a/r