Question

A cooling fan is turned off when it is running at 890 rev/min . It turns 1400 revolutions before it comes to a stop.

Part A What was the fan's angular acceleration, assumed constant? Express your answer using three significant figures. α α = −.400   rad/s2   SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 8 attempts remaining Part B How long did it take the fan to come to a complete stop? Express your answer to three significant figures and include the appropriate units. t t = 227s SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 8 attempts remaining

Answer 1

LU 60 We Widas where, ut & final angular velocity wi initial , which is equal to, 890 redv/min - 890x90 raden Wf 20, - ( 890 X 2) - 2 es & - 890 x 2n - 50 x 2 x 1400 x 20 = – 0'492 rader for time required, Wiwi-at wf=0 a) to niya 890x st Goxo uaz 189009 sec.