1. An electric fan is turned off, and its angular velocity… 1. An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in 4.00 s. (a) Find the angularacceleration in rev/s^2 and the number of revolutions made by the motor in the 4.00-s interval. Show the sketch of the problem.  (b) how many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in part (a)? Show the sketch of the problem. 2. A uniform 300-N trapdoor in a floor is hinged at one side. Find the net upward force needed to begin to open it and the total force exerted on the door by the hinges (a) if the upward force is applied at the center and (b) if the upward force is applied at the center of the edge opposite the hinges. Show the sketch of the problem.   Sketch is the most important on this problem please show the sketch of the problem 🙂 Science Physics PHYSICS 101L