Rotational inertia (TM 610)

investigation of mass moments of inertia in rotating, rigid bodies



  • The resistance with which a rigid body opposes a change to its rotation is indicated by the mass moment of inertia.
  • Here, the behaviour of the body depends on its mass and the distribution of this mass relative to the axis of rotation.
  • Mathematically, the quotient of the rotary moment and the angular acceleration is the mass moment of inertia.
  • The TM 610unit can be used to study mass moments of inertia of rotating bodies (hollow cylinder or solid cylinder).
  • The experimental unit is clamped to a table-top plate via two support rods.
  • A support rod supports the rotary axis with the studied body.
  • The rotary axis is accelerated by a weight, pulley and cable with a drum.
  • This results in a uniformly accelerated rotational motion.
  • Using the measured time, mass and acceleration distance, we can calculate the mass moment of inertia.
  • Systems with different masses and mass distributions can be studied in various geometries.
  • Using a rotating bar with masses, it is possible to study the mass moment of inertia as a function of the radius.

Technical Details:


  • investigation of the inertia of various bodies in rotational motion
  • hollow cylinder, solid cylinder or rotating bar with masses as a rotating body
  • generate a uniformly accelerated rotational motion via weight, pulley and cable drum
  • rotating bar: adjustable position of the mass to realise different radii
  • measure the time and the acceleration distance
  • position and fix the parts via table clamps

Technical Data:

  • Rotating bar
    • length: 550mm
    • masses: 2x 0,1kg, 2x 0,2kg, 2x 0,4kg
  • Solid cylinder
    • diameter: 120mm
    • mass: 0,9kg
  • Hollow cylinder
    • outer diameter: 120mm
    • inner diameter: 110mm
    • mass: 0,9kg
  • Weight for the drive
    • 1N

Dimensions & Weight:

  • L x W x H: 730x180x480mm (set-up)
  • Weight: approx. 13kg

Learning Objections/Experiments:

  • investigation of the inertia of rigid bodies in rotational motion
  • determine mass moments of inertia of different, regularly shaped bodies
  • investigation of the mass moment of inertia as a function of the radius

Scope of Delivery:

  • 1 experimental unit
  • 1 set of instructional material


Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.