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A solid body rotates about a stationary axis so that its angular velocity depends on the rotation angle φ as ω = ωo - αφ, where ωo and α are positive constants. At the moment t = 0 the angle φ = 0. Find the time dependence of

(a) The rotation angle;

(b) The angular velocity.

(a) The rotation angle;

(b) The angular velocity.