Physics

Problem

A pendulum is to be adjusted so that it makes exactly

2

oscillations per second when set into motion. Taking

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

, what should be the approximate length

\ell

of the pendulum? a)

0.06\,\text{m}

0.25\,\text{m}

0.78\,\text{m}

1.0\,\text{m}