PRACTICE / Pendulum experiment

Extract gravity from a straight-line graph

A small-angle pendulum experiment plots T² in s² against length L in metres. The best-fit line has slope 4.0 s²/m.

Find the inferred gravitational acceleration.

1. A$\pi^2\ \mathrm{m\,s^{-2}}$
2. B$4\ \mathrm{m\,s^{-2}}$
3. C$4\pi^2\ \mathrm{m\,s^{-2}}$
4. D$1/\pi^2\ \mathrm{m\,s^{-2}}$

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