Part of eval pr72 v4 main rerun 1, agent version bd007a8
Q. 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
draft 24: failed in solution.rb, line 5 — NoMethodError: undefined method 'time_taken' for an instance of Physics::PhysicalObject; time_taken is a quantity of Velocity, through UniformCircularMotion, not a method: reach it from a motion, as <motion>.time_taken
Latest draft
question.rb1 question :a_whirled_stone do2 kind :numerical3 describes "A stone on a string %{radius} long is whirled round a horizontal circle at a steady speed, %{turns} times in %{time}. %{acceleration}, in m/s²?"4 given radius: "80 cm"5 given turns: 14.06 given time: "25 s"7 asks acceleration: "What is its acceleration"8 end
solution.rb1 solve :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.time_taken6 acceleration = stone.centripetal_acceleration7 answer acceleration:, in: "m/s2", figures: 38 conclusion "The stone moves at a steady speed but its direction changes constantly, so it has a centripetal acceleration toward the centre."9 end
round 24
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