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?

expects 9.90 m/s²

16 checks, 0 agreed

draft 16: failed in solution.rb, line 5 — ArgumentError: wrong number of arguments (given 0, expected 1)

solution.rb · draft 16 stopped at line 5

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_takenArgumentError: wrong number of arguments (given 0, expected 1)6  deduce_from "14 times in 25 s", stone.revolutions / stone.goes.time_taken => "14.0 / 25.0"7  acceleration = stone.centripetal_acceleration8  answer acceleration:, in: "m/s2", figures: 39  conclusion "Its speed never changes, but its direction always does, and that turning is an acceleration pointed at the centre of the circle."10end