Question

An automobile engine slows down from 3000 rpm to 1500 rpm in 2.0 s . Part...

An automobile engine slows down from 3000 rpm to 1500 rpm in 2.0 s .

Part A

Part complete

Calculate its angular acceleration, assumed constant.

Express your answer using two significant figures.

α =

-79

  rad/s2  

SubmitPrevious Answers

Correct

Part B

Calculate the total number of revolutions the engine makes in this time.

Express your answer as an integer.

N

N

=

85

revolutions
0 0
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Answer #1

Part A:

اله - رله 277 - = -78.54 rad/s2 ( 1500 - 3000 20 =

Part B:

د - د 0 = 2a

(1500x27) _ (3000x2 60 - rad 2 x (-78.54)

A = 471.24 rad

0= 75 revolutions

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