CO Wiz Khalifa MAKE A 4 l X The Expert TAI Human-lik X C https:// /Common/TakeTu
ID: 1452076 • Letter: C
Question
CO Wiz Khalifa MAKE A 4 l X The Expert TAI Human-lik X C https:// /Common/TakeTutorialAssignment.aspx ust35nc.theexpertta.co Help Ch 7 Test Begin Date: 2016 12 05:00 AM Due Date: 4/2/2016 11:59:00 PM End Date: 4/3/2016 1:00:00 AM (8%) Problem 4: The angular speed of rotating platform changes from wo 4.8 s to 86 rad s at a constant rate as the rad platform moves through an angle A6 5.5 radians. The platform has a radius of R 24 Randomized variables 4.8 86 5.5 Assignment Status R 24 cm. Click here for A 33% Part (a Calculate the angular acceleration of the platform a in rads detailed view Grade Summary 10000 Time Remaining sin0 coso I tand 0:31.02 Attempts remaining: 3 cotano asino acos0 15% per attempt Problem Status detailed atano acotano sinho Completed Completed Degr Partial Completed Feedback: 50 deduction per feedback. Hints: 50 deduction per hint. Hint remaining Completed Completed A 33% Part (b) Calculate the tangential acceleration a, in m s of a point on the surface of the platform at the outer edge. Completed A 33% Part final centripetal acceleration ac, of a point at th edge of the platf Completed Completed x a ABP M Restore Down Student: Bstansil@uncc.edu My Account Logout EE 1:44 PM 4/2/2016Explanation / Answer
0 = 4.8 rad/s
= 8.6 rad/s
= 5.5 radians
R = 24 cm
a) ^2 = 0 ^2 + 2aO; so a = (^2 - 0 ^2)/2O = (8.6^2 - 4.8^2)/(2*5.5) = 4.63 rad/s^2.
b) At = aR = 4.63*0.24 = 1.111 m/s^2.
c) Ap = ^2 R = 8.6^2*0.24 = 17.75 m/s^2.