Estimate random uncertainty from repeats
Repeated timing measurements in a sports science launch test are \(1.45\,\text{s}\), \(1.48\,\text{s}\), and \(1.47\,\text{s}\). Estimate the random uncertainty using half the range. Enter the numerical result and choose the interpretation that matches the physics meaning.
Worked practice: physics data and result
Read the physical quantities first, then calculate the result and state what it means.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.