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The angular acceleration of the magnetic disk is determined as 35 rad/s².
The angular acceleration of the disk is determined from the principle of conservation of angular momentum.
τ = Iα
where;
I = ¹/₂MR²
I = ¹/₂ x 0.2 x 2²
I = 0.4 kgm²
α = τ/I
α = (14)/(0.4)
α = 35 rad/s²
Thus, the angular acceleration of the disk is determined as 35 rad/s².
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