human error problems with our own human fallibility
Use your stop clock to find the time for one and only one complete swing. This is called the PERIOD of the pendulum
Record attempt 1 in the table as shown below
Repeat this measurement three more times
Put all results in a neat table as shown, indicating how precise your readings are
Record each measurement to an appropriate number of significant figures
Expt | Attempt | Time / s | Sig. Figs. |
---|---|---|---|
A | 1 | +/- | |
2 | +/- | ||
3 | +/- | ||
4 | +/- | ||
B | 1 | ||
C | 1 |
Expt. B Find the time once and only once for 5 complete swings. Calculate and record the Period.
Expt. C Find the time once and only once for 20 swings. Calculate and record the Period.
Expt. D Find the time once and only once for 50 swings. Calculate and record the Period.
Questions …. To be answered in full sentences:
What sort of error occurs in each of the above expts, and why ?
If you had to choose a number of swings to find a reliable value for the Period, is there an optimum number of swings to use, and why ?
Extension if time:
Refer to your “How science works” sheets … how could you reduce each of the errors:
Apparatus: Stopclock. Simple pendulum.