Question

A uniform disk with mass m = 9.07 kg and radius R = 1.36 m lies...

A uniform disk with mass m = 9.07 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 313 N at the edge of the disk on the +x-axis, 2) a force 313 N at the edge of the disk on the –y-axis, and 3) a force 313 N acts at the edge of the disk at an angle θ = 31° above the –x-axis.

1) What is the magnitude of the torque on the disk about the z axis due to F1?
N-m
2) What is the magnitude of the torque on the disk about the z axis due to F2?
N-m
3) What is the magnitude of the torque on the disk about the z axis due to F3?
N-m
4) What is the x-component of the net torque about the z axis on the disk?
N-m
5) What is the y-component of the net torque about the z axis on the disk?
N-m
6) What is the z-component of the net torque about the z axis on the disk?
N-m
7) What is the magnitude of the angular acceleration about the z axis of the disk?
rad/s2
8) 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?
J

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