Exam 10: Rotation

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A disk with a rotational inertia of 2.0 kg.m2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center.A force of 5.0 N is applied tangentially to the rim.The angular acceleration of the disk is:

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A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 * 10-3 kg∙m2 is suspended from the ceiling.A rope passes over it with a 2.0-kg block attached to one end and a 4.0-kg block attached to the other.The rope does not slip on the pulley.When the velocity of the heavier block is 2.0 m/s the total kinetic energy of the pulley and blocks is:

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