ulaUrl":null,"initialIndex":4,"initialQuestionWindow":[{"id":"02999f4a-fb65-4e3b-b9a9-92b460fd3973","revisionId":"c8d62c8c-5763-4aaa-82f0-54fd955ffe4b","questionNumber":null,"questionType":"LA","specification":"The diagram below shows a spring calibration rig used to test the compression of a heavy spring.\n\nThe vertical position of a reference collar relative to the base plate is measured using a vertical steel ruler.\n\n![Spring Calibration Setup](https://assets.mathsgenie.co.uk/aqa-qb/19796a04-18c3-40de-96c0-e32d0a4050c9.png)","difficulty":4,"difficultyBand":"medium","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"0949d43c-56b6-4c07-97fd-5b144868fced","label":null,"content":"Describe how the measurement of the height, $y$, of the lower edge of the reference collar from the base plate can be made more accurate using the try square.","markscheme":"- Explains how to align the try square with the ruler, e.g. place one perpendicular edge of the try square flat and flush against the vertical steel ruler. M1\n- Explains how to use the perpendicular horizontal edge to take the reading, e.g. slide the try square along the ruler until its horizontal edge is level with the lower edge of the reference collar to read the scale (reducing parallax error). A1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"use_try_square","label":"Use the try square","steps":[{"type":"text","order":0,"title":"Align the square","content":"Place one perpendicular edge of the try square flat and flush against the vertical steel ruler.\n\nExaminer annotation (M1): the try square is placed flat and flush against the vertical steel ruler.","highlights":[{"text":"vertical steel ruler","location":"specification"}]},{"type":"text","order":1,"title":"Read the collar height","content":"Slide the try square along the ruler until its horizontal edge is level with the lower edge of the reference collar. Read the ruler at this level, viewing the scale straight on so that parallax error (an apparent shift caused by viewing from an angle) is reduced.\n\nExaminer annotation (A1): using the horizontal edge to line up with the collar gives the reading at the correct height.","highlights":[{"text":"lower edge of the reference collar","location":"specification"}]}]}],"generatedAt":"2026-07-22T09:16:43.697Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"0a9073f7-c540-4097-af14-41c6c52d93cb","revisionId":"0f40bcd7-b996-41c5-9b89-22a55e99a9e3","questionNumber":null,"questionType":"LA","specification":"","difficulty":6,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"cacca9ce-65dc-4f8b-97b0-0d0d4aa5618f","label":null,"content":"A bio-engineer investigating components for a micro-infusion pump concludes that the extension of a prototype tension micro-spring is directly proportional to the force applied to it.\n\n![Graph showing Force in mN vs Extension in micrometres](https://assets.mathsgenie.co.uk/aqa-qb/329a86c6-24be-4188-8470-a3f4f9ac0a7b.png)\n\n| Force / $\\text{mN}$ | Extension / $\\mu\\text{m}$ |\n| :--- | :--- |\n| 0.0 | 0.0 |\n| 50.0 | 12.0 |\n| 100.0 | 24.0 |\n\nExplain what the bio-engineer must do to test this conclusion in more detail.","markscheme":"- Measures the extension for a wider range of forces (e.g., up to $250\\text{ mN}$ or $300\\text{ mN}$) and/or takes readings at smaller, regular force intervals (e.g., every $25\\text{ mN}$) M1\n- Plots these new data points on the graph to check if the relationship remains linear (a straight line) A1\n- Confirms that the line of best fit continues to pass through the origin $(0,0)$ or calculates the ratio of extension to force to verify it remains constant A1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"extend_test","label":"Extend and check the data","steps":[{"type":"text","order":0,"title":"Take more readin

Forces and springs

Question 2

Forces and springs Questions

Forces and springs

Question 2

Forces and springs Questions