School of Physics Lecture Demonstration Manual

Mi-2 The Inclined Plane

Published: Thursday 09 March 2006 - Updated: Thursday 24 March 2011


To demonstrate the influence of moment of inertia on bodies rolling down an inclined plane.



Click on pictures to enlarge.

Inclined Plane Picture


Inclined Plane Video 1

Inclined Plane Video 2

Inclined Plane Video 3

Inclined Plane Video 4

Inclined Plane Video 5


The demonstration consists of releasing simultaneously on an inclined plane two objects of the same geometric shape but different mass. It is found that the two objects reach the bottom together. If however two objects of different shape are released the body with the larger moment of inertia takes the longer time.

Safety notes

Sharps Safety 


top of page