A 025 kg disk shaped machine part with a radius of80 cm, Ask an Expert

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A 0.25 kg disk shaped machine part with a radius of8.0 cm rotates eccentrically (off center) about an axis thatis normal to its flat surface and that is located two-thirds of thedistance from the center to the circumference.

(a) What torque is required to rotate the part aboutthis off-center axis with an angular acceleration of2.8 rad/s2?

(b) How much greater is this torque than the torque required to rotate the part with the same angular acceleration about a parallel axis through the center?

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