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Gravity - PowerPoint PPT Presentation


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Gravity. GRAVITY DEFINED. Gravity is the tendency of objects with mass to accelerate towards each other Gravity is one of the four fundamental forces (interactions) in nature. Gravity and our Solar System. The Sun’s gravity is what holds our solar system together. Planets and Gravity.

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Presentation Transcript
gravity defined
GRAVITY DEFINED
  • Gravity is the tendency of objects with mass to accelerate towards each other
  • Gravity is one of the four fundamental forces (interactions) in nature.
gravity and our solar system
Gravity and our Solar System
  • The Sun’s gravity is what holds our solar system together.
planets and gravity
Planets and Gravity
  • Since Jupiter is the largest planet, it has the most gravity.
  • Pluto has the least amount of gravity of all the planets
the history of gravity
THE HISTORY OF GRAVITY

Sir Isaac Newton

theorized the

Law of Gravitation in 1687

universal law of gravitation
UNIVERSAL LAW OF GRAVITATION

There is an

apple

on my head

Gravity is greater when mass is larger

and distance is shorter.

microgravity
MICROGRAVITY
  • The further an object is away from another object, the force of gravity is weaker.
  • The further an object moves from the surface of the Earth, the less gravity it feels from the Earth.
  • Scientists on the Space Shuttle experience microgravity
mass and weight are two different properties of matter
MASS

Mass is a physical property of matter that explains how much matter is in an object

Mass does not change when gravity changes

WEIGHT

Weight is a force which is calculated by multiplying the acceleration of gravity times mass.

Weight can change when gravity changes

Mass and Weight are two different Properties of Matter
slide9
MASS
  • IF YOU PULLED A MOUSE AND AN ELEPHANT WITH THE SAME AMOUNT OF FORCE, THE ELEPHANT WOULD RESPOND LESS TO PULLING EVEN IF HE DIDN’T PULL BACK AT ALL
  • THAT IS BECAUSE AN ELEPHANT HAS MORE MASS THAN A MOUSE
weight
WEIGHT
  • An elephant on the Earth would weigh less on the Moon, because gravity is less on the moon.
  • An elephant’s mass would not change if he went to the moon