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# PENDULUM

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1. PENDULUM

2. What’s a pendulum anyway??

3. What is a pendulum scientifically important??

4. WRONG IDEAS The earth is flat. The sun, moon, stars rotate the earth each day.

5. In the 6th century B.C. －ARISTARCHUS • 1543, COPERNICUS

6. NEWTON

7. In 1851, a French physicist named FOUCAULT found a way to prove the earth rotates via a OENDULUM FOUCAULT’s first demonstration FOUCAULT’s second demonstration FOUCAULT’s third demonstration

8. 1852, Foucault also invented the "GYROSCOPE,"

9. How the FOUCAULT PENDULUM works.

10. TODAY -- you can see this FOUCAULT PENDULUM demonstration yourself at theCALIFORNIA ACADEMY OF SCIENCES.

11. Why does the pendulum demonstrate the rotation of the earth?? Let's consider -- what ARE the forces acting on the pendulum?

12. We must understand the difference between 2 kinds of motions Twisting Traveling

13. If the Pendulum was at the EQUATOR If the Pendulum was at the POLE

14. Degrees of TWIST per day may be determined mathematically by this formula and can be demonstrated by using the pendulum Latitude = angular distance of a place from the equator

15. EXAMPLE by a Foucault Pendulum, man can demonstrate at any point on the Earth's surface (except on the equator) that the earth rotates--

16. How Rotation of the Earth affectsour Live??

17. How to figure the period of a simple pendulum??