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Galileo
By Dominique and Nathan
“Measure what can be measured, and make measurable
what cannot be measured.”
- Galileo Galilei
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!
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.
Some “funny” jokes
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.
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.
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?
Any Questions?
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Now we Test You!
1.
2.
3.
a)
b)
c)
d)
4.
What was the pendulum first used for?
What did Galileo discover within the first 10 years of
the 1600’s?
What happened to the chandelier when the breeze
stopped?
The chandelier also stopped swinging.
The chandelier continued swinging.
The chandelier stopped swinging within 3 seconds.
The chandelier broke and killed Galileo.
What year did Galileo invent the telescope in?
Bibliography
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://www.hps.cam.ac.uk/starry/galtele.html