Question

A uniform disk with mass m = 8.88 kg and radius R = 1.3 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 334 N at the edge of the disk on the +x-axis, 2) a force 334 N at the edge of the disk on the –y-axis, and 3) a force 334 N acts at the edge of the disk at an angle θ = 33° above the –x-axis.

A)What is the magnitude of the torque on the disk about the z axis due to F₁?
B)What is the magnitude of the torque on the disk about the z axis due to F₂?
C)What is the magnitude of the torque on the disk about the z axis due to F₃?
D)What is the x-component of the net torque about the z axis on the disk?
E)What is the y-component of the net torque about the z axis on the disk?
F)What is the z-component of the net torque about the z axis on the disk?
G)What is the magnitude of the angular acceleration about the z axis of the disk?
H)If the disk starts from rest, what is the rotational energy of the disk after the forces have been applied for t = 1.8 s?

Answer 1