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A disk of radius 10 cm speeds up from rest. It turns 60 radians reaching an angular velocity of 15 rad/s. What was the angular acceleration?
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Answers ( )
Answer: α = 1.875 rad/s²
Explanation:
ω₁² = ω₀² + 2αθ
ω₀ = 0
α = ω₁² / 2θ
α = 15² / 2(60)
α = 1.875 rad/s²