A student records the following data while using a simple pendulum to estimate

PHYSICS · Single correct · CBSE · Physics · Oscillations · Oscillations

Problem

g

. Length

\ell

(m):

0.50\quad 0.70\quad 0.90

Time for

20

oscillations

t

(s):

28.4\quad 33.4\quad 38.4

Taking the average of the three individual values of

g

calculated from each length, the best estimate of

g

is (a)

10.8\,\text{m s}^{-2}

(b)

8.9\,\text{m s}^{-2}

(c)

9.8\,\text{m s}^{-2}

(d)

9.4\,\text{m s}^{-2}