Students learned a useful physics lesson after successfully launching hundreds of water-bottle rockets they designed over the weekend.
The water rocket propulsion competition at King George V School in Kowloon saw 400 primary and secondary school students take part.
The event was part of the 'Energy for Learning - Flight of Hope' programme organised by the Boys' and Girls' Clubs Association of Hong Kong and the Hong Kong Aerospace Society. It was sponsored by Chevron Hong Kong.
The three-month programme includes workshops and lectures to promote students' interest and creativity in science and technology.
The aim of the rocket competition, held on Sunday, was to use plastic water bottles to create rockets and see which could travel the furthest.
The students designed the shape and size of the wings attached to the bottles to achieve this.