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Q4 (15 points): A uniform hoop of radius R - 15 cm and mass M 1.2 kg is placed at the top of an incline of height h-2 m. The surface of the incline makes an angle θ-30° with the horizontal. The hoop is released from rest and rolls without slipping. m MR2 for hoopl a) What is the acceleration of its center of mass (açom) during rolling? b) What is the force of friction in unit vector notation required to maintain pure rolling? c What is the angular speed at the bottom of the incline? Answer: a) 2.45 m/s b) 2.94 N c) 29.5 rads

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