Question: 1. A motor spins a disk (I disk = 25.7 kg*m 2 ) with a torque of 40 N*m, and a 18 N frictional force

1.

A motor spins a disk (Idisk = 25.7 kg*m2) with a torque of 40 N*m, and a 18 N frictional force acts on the disk at a radius of 1.6 m. Attached to the disk at a radius of 2.0 m is a 2.8 kg mass. What is the moment of inertia of the system?

2.

A motor spins a disk (Idisk = 25.6 kg*m2) with a torque of 40 N*m, and a 19 N frictional force acts on the disk at a radius of 1.3 m. Attached to the disk at a radius of 2.1 m is a 2.6 kg mass. What is the magnitude of the net torque in N*m of the system?

3.

A motor spins a disk (Idisk = 25.7 kg*m2) with a torque of 39 N*m, and a 13 N frictional force acts on the disk at a radius of 2.3 m. Attached to the disk at a radius of 1.7 m is a 8 kg mass. What is the magnitude of the angular acceleration in rad/s2 of the system?

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