A student drops a toy parachute from a window 5.50 m5.50\text{ m}5.50 m high. Her friend measures the time taken for the toy parachute to reach the ground.
Suggest suitable equipment used to measure the height of the window and the time taken for the toy parachute to reach the ground.
They record their results in a table:
| Attempt | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Time taken (s) | 3.12 | 3.38 | 3.34 | 3.38 | 3.28 |
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.