A student measures the time taken for a toy battery-powered motorboat to travel a straight distance of 8.20 m across a quiet outdoor pond.
Suggest suitable equipment used to measure the distance of 8.20 m and the time taken for the toy boat to travel this distance.
The student and a classmate record their results in the table below:
| Attempt | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Time taken (s) | 5.84 | 5.48 | 5.84 | 5.72 | 5.52 |
Use the data in the table to calculate the mean, median, and mode of their results.
Explain how you can tell from the data in the table that the results are not very precise.
Suggest a possible source of error in the experimental method and how it could be improved.
47 exam-style questions on OCR GCSE Physics Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.