Answer:
Step-by-step explanation:
150(2π) = 300π rad/s
60(2π) = 120π rad/s
-12(2π) = -24π rad/s²
ωf² = ωi² + 2αθ
θ = (ωf² - ωi²) / 2α
θ = ((120π)² - (300π)²) / 2(-24π)
θ = -75600π²/ -48π
θ = 1575π
θ = 1575π / 2π = 787.5 cycles
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