Question

1. An electric fan is turned off, and its angular velocity decreases uniformly from 600 rev/min to 200 rev/min in 4.00 s. Find the angular acceleration of electric fan in 4.00 minutes.

Answer 1

Step-by-step explanation:

To find the angular acceleration of the electric fan, we can use the formula:

angular acceleration = (final angular velocity - initial angular velocity) / time

Here, the initial angular velocity is 600 rev/min, the final angular velocity is 200 rev/min, and the time is 4.00 s.

Substituting these values in the formula, we get:

angular acceleration = (200 rev/min - 600 rev/min) / 4.00 s

angular acceleration = -400 rev/min / 4.00 s

angular acceleration = -100 rev/min^2

Therefore, the angular acceleration of the electric fan is -100 rev/min^2.