Physics Demo Number: 024

Approximate Run Time: 5 min

Rolling Without Slipping and Some Consequences (v= omega x r)

Demo Description

Roll Basketball On Top of a 2 Meter Stick with the aid of a second 2 Meter Stick

 

Scientific Principles

  • Rolling Motion of Rigid Bodies

  • (V = Omega x R) for no slipping

Equipment

  • Basketball

  • Two 2-meter sticks

Equipment Location

  • The basketball lives on [E-4-5] in Kit (024) which is a subset of Kit(001).

  • The 2-meter sticks live in the corner beside the door into SC4327.

Instructions

Photos show apparatus ( two 2-meter sticks and a basketball ) for demonstrating the concepts of

1. Rolling Without Slipping, and

2. The Velocity of any point in a body as the sum of the Velocity of the Center of Mass and the point's Velocity of Rotation about the center of mass.

One starts the basketball from one end of the lecture table and forces it to roll without slipping to the other end of the stationary 2-meter stick by propelling it with the top 2-meter stick.

Clearly the top two meter stick moves through 4m while the basketball moves through 2m.
   
Writeup created by David A. Burba
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