lan (139) Problem 6: Case 1. A Dy starts up her phonograph player. The tumtable accelerates uniformly from rest, and tak

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Lan 139 Problem 6 Case 1 A Dy Starts Up Her Phonograph Player The Tumtable Accelerates Uniformly From Rest And Tak 1 (42.26 KiB) Viewed 28 times

lan (139) Problem 6: Case 1. A Dy starts up her phonograph player. The tumtable accelerates uniformly from rest, and takest) 11.7 seconds to get up to its full speed of fj= 78 revolutions per minute, Case 2: The DJ then changes the speed of the turntable from ; = 78 to 5 - 120 revolutions per minute. She notices that the turntable rotates exactly ng= 18 times while accelerating uniformly Randomized Variables 11.7 seconds y = 18 times A 20% Part () Calculate the angular speed described in Case I. given as fi = 78 revolutions per minute, into units of radians/second Grade Summary 00) = Deductions 09 Potcntial 100% ग 7 E 4 Submissions Attempts remaining per attempt) decided view sino cos tano cotan asino acos atan acotan sinho cosho tanho cotanh() Degrees Radians 8 9 5 6 23 + 0 VO Submit Hint pive up! Pints dedactica per bist. Hints remaining 2 Feedback deduction per feedback A 20% Part (b) How many revolutions does the turntable make while accelerating in Case 1? A 205 Part (c) Calculate the magnitude of the angular acceleration of the turntable in Case 1, in radians/second A 20% Part (d) Calculate the magnitude of the angular acceleration of the turntable (in radians/second) while increasing to 120 RPM (Caso 2). A 20% Part (0) How long in seconds) does it take for the turntable to go from /,= 78 to 5 - 120 RPM?