The Rotational Motion Accessory Kit (AK-RMV) includes several discs for rotary motion experiments.

• Smooth discs: 1.05 x 10^-4 kg m²
  Typical dimensions and masses
  ▸The disc with a small hole: 106 g, 89.0 mm diameter, 3.6 mm hole
  ▸The disc with cork and a larger hole: 106 g, 89.0 mm diameter, 6.0 mm hole

• Heavy washer: 2.86 x 10^-4 kg m² (approximate, as dimensions and mass vary)
  Our sample’s dimensions and mass
  ▸ 270 g, 88.5 mm diameter, 27 mm diameter inner hole

• Metal rod: 4.93 x 10^-4 kg m² (when rotated about its center)
  Typical dimensions and mass
  ▸41 g, 38 cm length

• Plastic disk: 5 x 10^-7 kg m² (insert for washer)
  Typical dimensions and mass
  ▸4.5 g in mass, 27 mm diameter, 3.6 mm hole

• 3-step pulley: 2 x 10^-6 kg m²
  See also What are the dimensions of the 3-step pulley/wheel on the Rotary Motion Sensor?.

• (2) Round masses at ends of rod: 5.68 x 10^-3 kg m²
  Typical mass
  41 g in mass

Notes:
● In comparison to the metal disks, the plastic parts have negligible moments and can be disregarded.
● Masses will vary. For most accurate calculations, determine the mass independently.
● In early editions, experiment 14 of the Advanced Physics with Vernier — Mechanics (PHYS-AM) book incorrectly listed the value for the Moment of inertia as 100 times too large.

Rotary Motion Sensor Troubleshooting and FAQs
Go Direct Rotary Motion Troubleshooting and FAQs