a disk attached to a vertical axle has an initial angular velocity. The angular impulse that frictional forces exert on the disk accelerate the it reaches a complete stop. A student gathering data on the disk has already determined the rotational inertia and its initial angular velocity. What data should a student collect to determine the angular impulse of the disk?  a) the time it takes for the frictional force to slow the disk to a complete stop b) the net torque exerted on the disk  c) the force of friction exerted on the disk  d) no additional data is necessary to calculate the angular impulse

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