The angular speed of an automobile engine is increased from 600 rev/min to 3000 rev/min in 5 s.

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The angular speed of an automobile engine is increased from 600 rev/min to 3000 rev/min in 5 s.

[From: ] [author: ] [Date: 11-04-22] [Hit: ]

......

a) What is its angular acceleration, assuming the acceleration is uniform?

b) How many revolutions does the engine make during this time?

*These questions are driving me insane!

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change in angular speed = 3000-600 = 2400 rpm
change in angular speed = 2400 rpm = 2400 x 2π x 1/60 = 251 rad/s
angular acceleration = 251/5 = 50.2 rad/s² ANS a)
avg angular speed during 5 s time= (3000+600)/2 = 1800 rpm = 1800/60 = 30 rps
30 x 5 = 150 revolutions ANS b)

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