A student performs the experiment as described in the lab using a slightly different apparatus than the one you will use. The radius of the axle is 6 mm and the radius of the grey disk is 10 cm. She drops a 200g mass and the angular acceleration is 2.93 radians/s2.

a) Calculate the moment of inertia of the disk.

b) Calculate the mass of the disk.

She now adds a hollow cylinder to the apparatus. The inner and outer radii of the cylinder are 4 and 4.5 cm respectively. She drops the mass again and the new angular acceleration is 1.93 radians/s2.

c) Calculate the moment of inertia of the disk + cylinder together.

d) Calculate the moment of inertia of the cylinder by itself.

e) Calculate the mass of the cylinder.