Two masses, one with mass mA = 3.10 kg and the other with unknown mass mB, hang with a massless rope over a pulley with mass mC = 40.8 kg. The mass center of the pulley is located in the middle of the pulley. The pulley is attached with a frictionless bearing in the middle. g = 9,806 m/s². What is the radius of the pulley if it is a homogeneous circular disk with an angular acceleration of 3.74 rad/s² (clockwise), and the line affects mass A with a force of 40.9 N upwards?

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Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.