The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/s2 is
Answer & explanation
Correct answer: option 2
Angular acceleration, α = \(\frac{ω_f - ω_i}{t}\)
ωf = 3120 x \(\frac{2Π}{60}\) rad/s
ωi = 1200 x \(\frac{2Π}{60}\) rad/s
α = \(\frac{3120 - 1200}{16}\) x \(\frac{2Π}{60}\) = 4Π