The period of oscillation of a simple pendulum is

PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

T=2\pi\sqrt{l/g}

. The measured value of

l

20.0\ \text{cm}

, known to

1\ \text{mm}

accuracy, and the time for

100

oscillations is found to be

90\ \text{s}

using a wristwatch of

1\ \text{s}

resolution. What is the accuracy in the determination of

g