A 50-year-old woman and a 27-year-old man suffered minor injuries and asked to be taken to a hospital, Davies said.
Five children aboard were also treated at the scene and released to their parents, Davies said.
The trolley that travels from Farmer's Market to The Grove, lost its brakes at the end of the track near The Grove, Davies said.
"It hit the stop at the end, but it was not going that fast," Davies said. "The trolley had very minor damage."