Question

How does a pendulum demonstrate that the earth rotates?

Answer 1

$\huge\underline{Answer:-}$

Foucault's Pendulum demonstrates that earth rotates.

$\huge\underline{Explanation:-}$

A Foucault's pendulum, which has a huge metal bob is suspended with the help of a long metal wire from the roof of a suitable building (in the original experiment 28 kg brass-coated lead bob, a 67 metre long wire and dome of the Panthéon, Paris were used).

The plane of the pendulum's swing rotates clockwise, making a full circle in a time period depending on the latitude of the place where the pendulum is placed. Latitudes north of the equator are defined as positive and south of equator as negative. Therefore the rotation is anticlockwise in the southern hemisphere.

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