1F20.10 - Inertia Balls

Inertia balls

Click here to see movie.

PIRA Classification: 1F20.10

Description: Two steel balls hang from a ring stand. Each ball has a loop of string hanging below them. A rod is inserted in the first loop and is jerked quickly. The rod is the inserted in the second loop and pushed down slowly, but firmly.

Special Instructions: Pulling down quickly should break the bottom string. Pushing slowly should break the top string.

Condition: OK

Setup time: 2 minutes

Safety Issues: Watch your fingers.