The length of a simple pendulum is about and is known with an accuracy of

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

The length of a simple pendulum is about

100\,\mathrm{cm}

and is known with an accuracy of

1\,\mathrm{mm}

. Its period is

2\,\mathrm{s}

, determined by measuring the time for

100

oscillations using a clock with

0.1\,\mathrm{s}

resolution. What is the accuracy in the determined value of

g

? (1)

0.2\%

(2)

0.5\%

(3)

0.1\%

(4)

2\%