| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.SL.TZ0.3 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 3 | Adapted from | N/A |
Question
The acceleration of free fall g is determined by the relationship \(g = \frac{{4{\pi ^2}l}}{{{t^2}}}\). The uncertainty in the value of l is 2% and the uncertainty in the value of t is 5%. What is the uncertainty in g?
A. 3%
B. 7%
C. 8%
D. 12%
Markscheme
D
Examiners report
Response B proved to be a popular distracter, particularly at SL, with candidates failing to spot that squaring the time doubles its uncertainty.
Syllabus sections
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