GalileoGalileo

By Dominique and NathanBy Dominique and Nathan

““Measure what can be measured, and make measurable Measure what can be measured, and make measurable what cannot be measured.” what cannot be measured.” - Galileo Galilei - Galileo Galilei

OverviewOverview

In this presentation we will be talking aboutIn this presentation we will be talking about......

- The Pendulum ClockThe Pendulum Clock- Some “funny” jokesSome “funny” jokes- The Laws of InertiaThe Laws of Inertia- True or FalseTrue or False- The TelescopeThe Telescope- A Surprise!A Surprise!

Pendulum ClockPendulum Clock

Galileo was always interested in the side to side Galileo was always interested in the side to side movement of a suspended weight. His first thoughts movement of a suspended weight. His first thoughts about the pendulum were when he noticed that as a about the pendulum were when he noticed that as a breeze rolled in, a chandelier rocked back and forth. breeze rolled in, a chandelier rocked back and forth. When the breeze stopped, the chandelier continued to When the breeze stopped, the chandelier continued to rock. The pendulum was first used for recording rock. The pendulum was first used for recording someone’s pulse, and for the metronome, which helps someone’s pulse, and for the metronome, which helps you keep in time when playing music. When Galileo was you keep in time when playing music. When Galileo was 77, completely blind, he discovered that the pendulum 77, completely blind, he discovered that the pendulum also could be used for clocks. The equation for the also could be used for clocks. The equation for the pendulum includes the time it takes the pendulum to pendulum includes the time it takes the pendulum to swing from side to side, the length of the pendulum, and swing from side to side, the length of the pendulum, and the acceleration of the falling body due to gravity. the acceleration of the falling body due to gravity.

Some “funny” jokesSome “funny” jokes

Laws of InertiaLaws of Inertia

Galileo discovered the laws of inertia within the first Galileo discovered the laws of inertia within the first ten years of the 1600’s. The law of inertia states that ten years of the 1600’s. The law of inertia states that “If the forces acting upon an object are balanced, “If the forces acting upon an object are balanced, then the acceleration of that object will be 0 m/s/s.” then the acceleration of that object will be 0 m/s/s.” (meter per second squared.) An example is, if you (meter per second squared.) An example is, if you put a ball on top of an inclined plane and it starts put a ball on top of an inclined plane and it starts rolling down, the speed will increase as it continues rolling down, the speed will increase as it continues down. The longer the inclined plane, the more the down. The longer the inclined plane, the more the speed of the ball will increase. In other words, the speed of the ball will increase. In other words, the longer the hill to roll down, the faster the ball will end longer the hill to roll down, the faster the ball will end up rolling.up rolling.

The TelescopeThe Telescope

Galileo was not the inventor of the telescope. He Galileo was not the inventor of the telescope. He simply improved the spyglass telescope made by Hans simply improved the spyglass telescope made by Hans Lippershey. When he was in Venice, Italy during July Lippershey. When he was in Venice, Italy during July 1609, Galileo heard of an invention that allowed people 1609, Galileo heard of an invention that allowed people to see objects that were far away, as clear as if they to see objects that were far away, as clear as if they were right in front of you. He then began making were right in front of you. He then began making improvements to it. After 24 hours of hard work he built improvements to it. After 24 hours of hard work he built a 3 power telescope. a 3 power telescope.

True or FalseTrue or False

-Galileo invented the clock: T or F?-Galileo invented the clock: T or F?-Galileo was always interested in the up and down -Galileo was always interested in the up and down

movement of a suspended weight: T or F?movement of a suspended weight: T or F?-The pendulum was first used for recording someone’s -The pendulum was first used for recording someone’s

pulse: T or F?pulse: T or F?-The longer the inclined plane, the faster the object will -The longer the inclined plane, the faster the object will

move: T or F?move: T or F?-After 24 hours of hard work, Galileo made a 6 power -After 24 hours of hard work, Galileo made a 6 power

telescope: T or F?telescope: T or F?-Galileo invented the telescope: T or F?-Galileo invented the telescope: T or F?

Any Questions?Any Questions?

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Now we Test You!Now we Test You!

1.1. What was the pendulum first used for?What was the pendulum first used for?2.2. What did Galileo discover within the first 10 years of What did Galileo discover within the first 10 years of

the 1600’s?the 1600’s?3.3. What happened to the chandelier when the breeze What happened to the chandelier when the breeze

stopped?stopped?a)a) The chandelier also stopped swinging.The chandelier also stopped swinging.b)b) The chandelier continued swinging.The chandelier continued swinging.c)c) The chandelier stopped swinging within 3 seconds.The chandelier stopped swinging within 3 seconds.d)d) The chandelier broke and killed Galileo. The chandelier broke and killed Galileo. 4.4. What year did Galileo invent the telescope in? What year did Galileo invent the telescope in?

BibliographyBibliography

http://muse.tau.ac.il/museum/galileo/the_law_of_inertia.html

http://galileo.rice.edu/

http://www.criticalpages.com/tag/pendulum-equation/ http://www.criticalpages.com/tag/pendulum-equation/

http://www.universetoday.com/15763/galileos-telescope/http://www.universetoday.com/15763/galileos-telescope/

http://inventors.about.com/od/gstartinventors/a/http://inventors.about.com/od/gstartinventors/a/

Galileo_Galilei_2.htmGalileo_Galilei_2.htm http://www.hps.cam.ac.uk/starry/galtele.html http://www.hps.cam.ac.uk/starry/galtele.html