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Physcis

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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

  • Physcis -

    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.

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