A grinding wheel attained an angular velocity of 20 rad / sec in 5 sec starting from rest. Find the number of revolutions made by the wheel:-

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ω = ω 0 ​ + α t 20 α ω 2 2 0 2 Δ θ ​ = 0 + α ( 5 ) = 4 r a d / s 2 = ω 0 2 ​ + 2 α Δ θ = 0 + 2 ( 4 ) Δ θ = 8 400 ​ = 50 r a d = 2 π 50 ​ re v = π 25 ​ re v ​

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