Towering at 22 metres, the Energy Machine is the tallest and largest exhibit of the Hong Kong Science Museum, spanning all exhibition floors. When set in motion, a continuous stream of balls roll along tracks within and between two towers, producing dramatic sounds and visuals that vividly demonstrate the process of energy conversion. The machine is divided into three sections: Tower A, Tower B, and a Connecting Gallery.
The Beginning (Tower A)
Balls ascend to their highest point via the Ball Elevator, gaining potential energy. As they descend along the track, this potential energy converts into kinetic energy. Some balls return to the base of Tower A through the Cylindrical Spiral and Loop.
In Transit (Connecting Gallery)
Other balls travel to Tower B via the Wavy Track or the straight track in the Connecting Gallery.
The Energy Symphony (Tower B)
Upon arrival, balls activate various musical instruments, including the Drums, the Chimes and the Xylophone. A portion of the balls' kinetic energy is converted into sound energy, presenting visitors with a dynamic "energy symphony". Other balls become Flying Balls, interact with the Seesaw, propel the Moving Fins. Some sway in the Curve, while many spin around the gigantic funnel-shaped Gravity Well. Leaving Tower B, balls descend to the Conical Spiral. Finally, all balls return to the Ball Reservoir at Tower A, ready to begin their journey again.
Quick Facts
- The whole spectacular process demonstrates a diverse form of energy conversion. Energy is converted from one form to another and is neither created nor destroyed.
- Each synthetic fibre ball measures 19 cm in diameter and weighs 2.3 kg.
- The track exceeds 1.6 kilometres in length and is equipped with many computer-controlled detectors, gates and indexers to manage the entry and exit of balls through various sections.
Operation Time: 11:00 am, 2:00 pm and 5:00 pm
Please check "Today's Programme Schedule" at the Museum for the latest updates. Programmes are subject to change without prior notice.
