A pendulum of length takes to complete oscillations

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

Problem

A pendulum of length

0.90\,\text{m}

takes

38\,\text{s}

to complete

20

oscillations. The value of

g

obtained from this observation is closest to (a)

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

(b)

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

(c)

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

(d)

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