A uniform disk with mass m = 8.57 kg and radius R = 1.36 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 338 N at the edge of the disk on the +x-axis, 2) a force 338 N at the edge of the disk on the –y-axis, and 3) a force 338 N acts at the edge of the disk at an angle θ = 31° above the –x-axis. 1) What is the x-component of the net torque about the z axis on the disk? 2) What is the magnitude of the angular acceleration about the z axis of the disk? 3) If the disk starts from rest, what is the rotational energy of the disk after the forces have been applied for t = 1.6 s?

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.