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

2. Overview In this presentation we will be talking about... -The Pendulum Clock -Some “funny” jokes -The Laws of Inertia -True or False -The Telescope -A Surprise!

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

4. Some “funny” jokes

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

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

7. True or False -Galileo invented the clock: T or F? -Galileo was always interested in the up and down movement of a suspended weight: T or F? -The pendulum was first used for recording someone’s pulse: T or F? -The longer the inclined plane, the faster the object will move: T or F? -After 24 hours of hard work, Galileo made a 6 power telescope: T or F? -Galileo invented the telescope: T or F?

8. Any Questions? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ????????????????????????????????????? ?????????????????????????????????????

9. Now we Test You! 1.What was the pendulum first used for? 2.What did Galileo discover within the first 10 years of the 1600’s? 3.What happened to the chandelier when the breeze stopped? a)The chandelier also stopped swinging. b)The chandelier continued swinging. c)The chandelier stopped swinging within 3 seconds. d)The chandelier broke and killed Galileo. 4. What year did Galileo invent the telescope in?

10. Bibliography http://muse.tau.ac.il/museum/galileo/the_law_of_inertia.ht ml http://muse.tau.ac.il/museum/galileo/the_law_of_inertia.ht ml http://galileo.rice.edu/ http://www.criticalpages.com/tag/pendulum-equation/ http://www.universetoday.com/15763/galileos-telescope/ http://inventors.about.com/od/gstartinventors/a/Galileo_G alilei_2.htm http://inventors.about.com/od/gstartinventors/a/Galileo_G alilei_2.htm http://www.hps.cam.ac.uk/starry/galtele.html