A pendulum hangs at rest from a hook in a ceiling of a building. The building is

Question

A pendulum hangs at rest from a hook in a ceiling of a building. The building is located at a

latitude such that the radius vector from the center of Earth to the building makes an angle

= 45 degrees with Earth's rotation axis. Assume that the force of gravity is everywhere

the same and points directly at the center of Earth. What is the angle that the pendulum

makes with the local vertical because of Earth's rotation? (Earth rotates about its axis once

a day; Earth's radius is 6400 km).

1. 0.05 degrees

2. 0 degrees

3. 0.1 degrees

4. 0.2 degrees

Explanation / Answer

Option 2 : 0 degrees

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