A potter's wheel decelerates from 50 rev/min to 30 rev/min in 5.0 s, with a constant deceleration. what is the magnitude of the deceleration?

To solve this problem, we should remember that the formula for angular acceleration is:

α = Δω / Δt

Where,

α = angular acceleration

ω = angular velocity

t = time

Substituting the known given values:

α = (30 rev / min - 50 rev / min) * (1 min / 60 s) / 5 s

α = - 0.067 rev / s^2

We can see that the values is negative since the potter’s wheel is decelerating.