A complete IB DP Physics hands-on practical for Topic A.1 Kinematics, SL and HL, first assessment 2025, offered free as a full-quality sample of the premium catalogue: students measure the acceleration of free fall, g, by timing an object falling from rest through a range of heights, then linearise s = ½gt² and read g from the gradient of an s-against-t² graph. Not a cut-down teaser but the complete practical, nothing watermarked.
This is a structured IB Inquiry lab worksheet, not an expository lesson. Students state and explain a prediction, set out the independent, dependent and controlled variables, justify the range of heights and the repeat readings, and address the safety hazards of the rig. They collect repeat fall times on an electronic millisecond timer, compute t² with propagated uncertainties, and read g from the gradient. They compare their value to the accepted 9.81 m s⁻², judge whether it lies within range, and evaluate random and systematic error.
IB skills span Tool 1: Experimental techniques, Tool 2: Technology, Tool 3: Mathematics and the Inquiry cycle:
- Measuring time and length to an appropriate precision (taught).
- Recording and propagating uncertainties, through a power and a gradient (taught).
- Linearising a relationship, and drawing uncertainty bars and maximum and minimum gradient lines (taught).
- Plotting with proper scales and axes, drawing the line of best fit, justifying a conclusion against the accepted value, and explaining realistic improvements such as light gates or video analysis (practised).
What’s included:
- Student Worksheet - 10 pages, answers stripped
- Teacher Key - 13 pages, every answer, model data and marking point
- Worked Solutions - 8 pages, with the model graph
- Assessment - 7 pages, a questions-only write-up copy with IB mark allocations
- Lesson deck - 36 slides, staged reveals for the prediction, the processing and the graph
This is a skills practical: it does not teach a new IB understanding, but exercises the topic’s Tool and Inquiry skills against the free-fall context. Worksheet and deck open in any browser with nothing to install, and the worksheet is fully editable, so the data and heights adapt to your class. Suitable for grades 11-12 (ages 16-19).
Part of the A.1 Kinematics Complete Unit Bundle: every pack for the topic, 30% off buying them separately.
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