Question

I need help!
A ceiling fan with 81-cm diameter blades is turning @ 70rpm. Suppose the fan coasts to a stop 30s after being turned off.
Through how many revolutions does the fan turn while stopping
I already solved for v
v=2.0m/s

Answer 1

find the angular acc. then use the displacement equation

Answer 2

use this to find acc (alp\[\omega _{f}=\omega _{i}+\alpha t\]ha)
then use this to find theta (displacemnet)
\[\theta=\omega _{i}t+\frac{ 1 }{ 2 }\alpha t ^{2}\]

Answer 3

Thank you so much @AJ01!!