Homework 9 Begin Date: 4/11/2018 12:00:00 AM-Due Date: 4/23/2018 11:59:00 PM End Date: 4/23/2018 11:59:00 PM (8%) Problem 4: A disk at rest experiences a constant angular acceleration for t= 15 s, at the end of which it is spinning with a frequency of f= 55 rpm. Please answer the following questions. Randomized Variables t=15 s f=55 rpm & 17% Part (a) Write an expression for the magnitude of the angular velocity of the disk after the acceleration in terms of the frequency. Grade Summary M 000 d BFP h m Submit Hints: 29 deduction per hint. Hints remaining: 3 BK X f P Hint (0) 8 D 8 k t t + V 0 # - 7 8 9 AIGM 4 5 6 1 0 2 3 HA A X I give up! Feedback: 200 deduction per feedback. Deductions Potential 0% 100% Submissions Attempts remaining: 7 (0% per attempt) detailed view & 17% Part (b) Calculate the magnitude of the angular velocity of the disk in rad's at time t= 15 s. 17% Part (c) Write an expression for the average angular acceleration of the disk a... in terms of angular velocity. 17% Part (d) Calculate the magnitude of the average angular acceleration of the disk a from rest to t= 15 s in rad/s. 17% Part (e) Write an expression for the period of the disk in terms of frequency f 17% Part (f) Calculate the magnitude of the period of the disk 7 at time 1-15s in seconds.