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Finding the number of revolutions for an car in an angular system 
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#1
Nov208, 02:49 PM

P: 20

1. The problem statement, all variables and given/known data
The angular speed of an automobile engine is increased at a constant rate from 1500 rev/min to 3900 rev/min in 14 s. (A) What is its angular acceleration in revolutions per minutesquared? (B) How many revolutions does the engine make during this 14 s interval? 2. Relevant equations I found out (A) to be 10285.71429 rev/min^2, but I have no idea how to do (B). would have to find tangential velocity or do i have enough information already? 3. The attempt at a solution for (A), i used the formula [tex]\alpha[/tex] = [tex]\Delta[/tex][tex]\omega[/tex] / time so (3900rev/min  1500rev/min)/14, and this was 10285.71420rev/min^2 i just don't know how to start (B).. 


#2
Nov208, 02:50 PM

P: 20

oh sorry, the alpha stands for angular acceleration
the delta of little omega stands for change in anuglar speed :] 


#3
Nov208, 02:50 PM

P: 20

whoops, change in angular* speed



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