Gravity

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Gravity
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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.

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Gravity and our Solar System

• The Suns gravity is what holds our solar system
  together.

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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

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THE HISTORY OF GRAVITY

• Sir Isaac Newton
• theorized the
• Law of Gravitation in 1687

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UNIVERSAL LAW OF GRAVITATION
There is an apple on my head

• Gravity is greater when mass is larger
• and distance is shorter.

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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

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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

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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 DIDNT PULL BACK AT
  ALL
• THAT IS BECAUSE AN ELEPHANT HAS MORE MASS THAN A
  MOUSE

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WEIGHT

• An elephant on the Earth would weigh less on the
  Moon, because gravity is less on the moon.
• An elephants mass would not change if he went to
  the moon