A stone on a string 80 cm long is whirled round a horizontal circle at a steady speed, 14 times in 25 s. What is its acceleration, in m/s²?

1solve :a_whirled_stone, using: UniformCircularMotion do2  objects :stone3  paths :circle4  stone.goes(:round, on: circle)5  take radius: circle.radius, turns: stone.revolutions, time: stone.goes.time_taken(25)ArgumentError: wrong number of arguments (given 0, expected 1)6  deduce_from "14 times in 25 s", stone.goes.time_taken => "25 s"7  acceleration = stone.centripetal_acceleration8  answer acceleration:, in: "m/s2", figures: 39  conclusion "The stone moves at a steady speed in a circle, so its acceleration is centripetal, " \10             "pointed at the centre, and its size is set by its speed and the circle's radius."11end