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**1. Homework Statement**

A turntable moves from rest to an angular speed of 45 rev/min in 1.5 s. What is its average angular acceleration?

**2. Homework Equations**

ω = ω

_{o}+ [itex]\alpha[/itex]t

**3. The Attempt at a Solution**

I first converted 45 to radians by multiplying it by pi

45(3.14152654)/180 = .79 rad

then I plugged it into the above equation

.79 = α(1.5)

α = .53 r/s

^{2}

The actual answer is pi r/s

^{2}