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4. A disc of radius 0.5 m starts from rest and accelerates with a constant angular acceleration of 1 rad / s'. a. At the start, that is, when the angular velocity is initially zero: i. Calculate the tangential acceleration of a particle on the rim ii. Calculate the centripetal acceleration of a particle on the rim Calculate the linear acceleration of a particle on the rim b. From rest until it has turned through n/4 radians, What is the angular velocity of the disc? 11. How long will it take to reach this angular velocity? Calculate the centripetal acceleration of a particle on the rim iv. Calculate the linear acceleration of a particle on the rim. c. From rest until it has turned through - radians, 1. What is the angular velocity of the disc? 11. How long will it take to reach this angular velocity? ini. Calculate the centripetal acceleration of a particle on the rim iv. Calculate the linear acceleration of a particle on the rim