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Gravity: Prezi

A presentation about Gravity. This guide might help others when they needed it.

Abet A

on 24 June 2013

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Transcript of Gravity: Prezi

By: Albert .A.

What is Gravity?
-Gravity is a natural phenomenon by which physical bodies attract each other with a force, which is proportional to their masses.
-Gravity with mass would attract each other.
-Gravity is also holds the solar systems by using the sun's gravity mass.
-Gravity is a force of attraction that exists between any two masses, bodies or particles.
-With gravity, it holds you and everyone else on the surface of the earth.
-Without gravity, we would float into the atmosphere, along with all the matter on Earth.
What are Gravitons?
-Gravitons are a hypothetical quantum of gravitational energy, which acts like a particle.
-Gravitons that have mass in it emits tiny particles.
-These gravitons are responsible for the gravitional attraction.
-If the gravitons has more mass, it receives more gravitons it would get.
-It would be also considered as a difference in gravitional attraction over distances.
The Force of Gravity
-The force of gravity is about 100 kilometres (about 62 miles) above Earth.
-Above Earth is 3% less than the Earth's surface.
-The force of gravity exerted by the gravitional field of a massive object on any body within the vicinity of its surface.
-The force is dependent on three factors:
-The mass of the massive object.
-The mass of the smaller body
-The separation between the two, measured between their geometrical enters.
Universal Gravitation
-The Force of gravity would act between two objects.
Example: You (the human) would be attracted to everything else in the universe.
-The strength of the force depends on the masses of the objects.
-Other things that have great mass are the moon and the sun.
-The force of the gravity is also depends on the distance between the objects.
-If the different planets have different mass, that means you would have a different weight in each of them.

Facts about Gravity
To display my learning, I'll tell you
the things I've learned below?
What is Gravity?
With these gravitons, it carries
the binding power of the
gravitational force.
The area near or surrounding a particular place
Apply or bring to bear (a force, influence, or quality)
Universal Gravitation Weight Finding
-To find your weight, you must use "how many pounds" you are.
-Say you are 106 pounds for an example.
-You must use this table below: (Use the gravitational pull (g))

Mercury: 0.40 Venus: 0.90
Earth: 1.00 Mars: 0.40
Jupiter: 2.50 Saturn: 1.10
Uranus: 0.90 Neptune: 1.20

-Now do this: (106 x what planet you want to find) in order to get your weight
Universal Gravitation Chart
Ex: If you were to use 106 as your pounds
Mercury: Your weight
42.4 or 42
Venus: Your weight
95.4 or 95
Mars: Your weight
42.4 or 42
Jupiter: Your weight
Saturn: Your weight
116.6 or 117
Uranus: Your weight
95.4 or 95
Neptune: Your weight
127.2 or 127
Let's talk about two of the astronomers or scientists who thought of the theories of gravity
Galilei and Newton
Galileo Galilei
-Galileo's work set the stage for the formulation of Newton's theory.
-Galileo realized that a falling body picked up speed at a constant rate (constant acceleration).
-He also made the crucial observation that, if air resistance and buoyancy can be neglected, all bodies fall with the same acceleration, bodies of different weights dropped together reach the ground at the same time.
-Galileo noted that if a ball rolls without interference on a smooth horizontal surface, and friction and air resistance can be neglected, its velocity will remain constant.
-Galileo have dropped a ten pound weight and a one pound weight off the Leaning Tower of Pisa.

What are Gravitons
The Force of Gravity
Universal Gravitation
Galilei and Newton
-Newton’s law of universal gravitation describes the gravitational attraction between bodies with mass, the earth and the moon.
-Newton’s three laws of motion relate the forces acting on a body to its motion.
-The first is the law of inertia, it states that ‘every object in motion will stay in motion until acted upon by an outside force’.
-The second is commonly stated as ‘force equals mass times acceleration’, or F = ma.
-The third and final law is commonly known as ‘to every action there is an equal and opposite reaction’.
-Newton was known for formulating a theory of gravitation.
-Newton was inspired by watching an apple fall from a tree.
-Newton have made up this own famous formula (F=Gm1m2/r^2). It was used for hundreds of years to describe the (approximate) orbits of the planets around the Sun, and the (approximate) trajectories of things like spacecraft.
-This famous formula was also used to calculate a person's weight on a given planet.
Isaac Newton
Gravity is a gravitional force
where we are able to stay on
the ground, instead of floating
into space.
Law of Universal Gravitation
Theory of Gravity
-Tides are caused by the rotation of the Earth and the gravitational effects of the moon.
-Highest known acceleration voluntarily experienced by a human is 46.2g by g-force pioneer John Stapp.
-If you ignore air resistance (drag) then the speed of an object falling to Earth increases by around 9.8 metres per second.
-The human body can handle increased
g-forces as seen in activities such as
dragster races, airplane acrobatics and space training.
More Facts about Gravity
Objects in space not only fall toward the earth, but also sideways or around the earth.
When an object floats on the top of water, gravity is still in play. For an object to float, it must displace enough water to make up the same mass as the object itself.
When one space object revolves around another, it is referred to as an orbit.
We don't actually "feel" gravity. We only feel the effects of trying to overcome it by jumping or when we fall.
The ability or tendency to float in water or other fluid.
The speed of something in a given direction.

Earth: Your weight
MrGraw-Hill Ryerson: BC Science 9
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