Teams will construct their own yo-yo prior to the event.

1. The suspended mass may not exceed 1 kg.

2. The maximum distance between the point of suspension and the floor is not to exceed 6 m. The yo-yo must start between the point of suspension and the floor.

3. The yo-yo may travel in a vertical direction only. A horizontal displacement which does not exceed 3 cm from the vertical will be allowed.

4. Only the initial gravitational potential energy of the yo-yo may be used as an energy source for the yo-yo.

5. The yo-yo or any part of the apparatus may not touch the floor and must be supported at one point only.

6. To help the judges, you might try suspending a stick or piece of wood from the ceiling close to the area where the yo-yo will be suspended. Attach this to the floor and use a marker for determining the score. Instead of wood, you might consider a piece of tape on the wall or a piece of string.

You should have two people marking - one person to record B and one to record C (see diagram).
All measurements must be done in metres.

SCORING:

The distance between the position of the yo-yo at at its lowest point (B) and the position of the yo-yo at the end of the first cycle (C) is measured and is entered as the score.

Three attempts will be allowed. No modifications to the apparatus are allowed between runs.