The vacuum cleaners armature shaft S rotates with an angular acceleration of = 4 3/4 rad/s

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The vacuum cleaner’s armature shaft S rotates with an angular acceleration of α = 4ω3/4 rad/s2, where ω is in radωs. Determine the brush’s angular velocity when t = 4 s, starting from ω0 = 1 rad/s, at t = 0. The radii of the shaft and the brush are 0.25 in. and 1 in., respectively. Neglect the thickness of the drive belt.

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