Torque, Ꞇ = 75 Nm
Moment of inertia, I = 275 kgm2
Initial angular speed, ωi = 0 rad/s
Number of revolutions, n = 2
If α is the angular acceleration then
Angular acceleration, α = Ꞇ/I = 75/275 = 0.273 rad/s2
Using the equation, θ = ωi t + ½ α t2
But, θ = 2πn
2πn = ½ α t2
2 x 3.14 x 2 = ½ x 0.273 x t2
t = 9.6 s
time required to make 2 revolutions is
(d) : 9.6 s
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