Physcis
posted by Sandy .
In the process of starting up the car plant, a turbine accelerates from rest at 0.49 rad/s^2 .How long does it take to reach its 4400 rpm operating speed?
How many revolutions does it make during this time?
I got 940 s for the first part, but for the second part Do i use the formula theta=w^2/2(.49/2pi)
I am very lost on the second part.
I am very lost please help. I determined that

on the second...
revolutions= wi*t+ 1/2 alpha*t^2
wi is zero
alpha is ang acceleration in rpm
alpha= .49rad/s^2 * 3600sec^2/min^2*1rev/2pi rad
That ought to do it.