A disc initially at rest, is rotated about its axis with uniform angular acceleration. In the first 2 s, it rotates an angle θ . In the next 2 s , the disc rotates through an angle

Question

A disc initially at rest, is rotated about its axis with uniform angular acceleration. In the first 2 s, it rotates an angle θ . In the next 2 s , the disc rotates through an angle, θ, 2 θ, 3 θ, 4 θ

MARKS App · Accepted Answer

Because of uniform angular acceleration. we can use the equation of motion in rotation θ = 1 2 α 2 2 ω 0 = 0 θ = 2 α And θ + θ ' = 1 2 α 2 + 2 2 ∵ ω 0 = 0 θ + θ ' = 8 α Hence, θ ' = 3 θ

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