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ronny45

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**[SOLVED] Mechanics - gravity**

## Homework Statement

A pendulum bob is suspended from a long pole at a latititude of 55 degrees north on the Earth. When the pendulum is at rest, the combined action of gravitation and Earth's rotation makes the bob deviate towards the south. By how much does the bob deviate?

(Radius of Earth = 6378km)

## The Attempt at a Solution

Okay... firstly, I'm assuming that the tension is divided into components so that the vertical component equals the weight of the bob. Therefore, the horizontal force is indeed acting towards the south. Now, the rotational speed of the Earth is obviously 1 day = 86400s. The angle of deflection (theta) is what I'm looking for. Any ideas?