Physics 9702/23 — May/June 2023
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Physical Quantities and Units · Dynamics · Kinematics · Measurement Techniques · Forces, Density and Pressure · Work, Energy and Power · +6 more
A well has a depth of from ground level to the surface of the water in the well, as shown in Fig. 1.1.
A student wishes to find the depth of the well. The student plans to drop a stone down the well and record the time taken from releasing the stone to hearing the splash made by the stone as it enters the water.
Assume that air resistance is negligible and that the stone is released from rest.
Calculate the time taken for the stone to fall from ground level to the surface of the water.
time = ______
The time recorded by the student using a stop-watch is not equal to the time in (a).
Suggest three possible reasons, other than the effect of air resistance, for this difference.
1 ................................................................................................................................................
2 ................................................................................................................................................
3 ................................................................................................................................................
The student repeats the experiment three times and uses the results to calculate the depth of the well. The values are shown in Table 1.1.
Table 1.1
| 1st experiment | 2nd experiment | 3rd experiment | |
|---|---|---|---|
| depth/m | 54.4 | 53.9 | 54.1 |
The true depth of the well is . Explain why these results may be described as precise but not accurate.
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