STANDARD Physics Angular Deceleration MCQ Question
A flywheel rotating at 420 rpm slows down at a constant rate of 2 rad s⁻². The time required to stop the flywheel is
22 s
11 s
44 s
12 s
Correct Answer
Detailed Explanation
The initial angular velocity ω₀ = 420 rpm = 44 rad/s. Using the equation ω = ω₀ + αt, where ω = 0 and α = -2 rad/s², we find t = (0 - 44)/(-2) = 22 s.
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