GravityQuickTime™ and aTIFF (Uncompressed) decompressor

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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.

Gravity and our Solar System

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• The Sun’s gravity is what holds our solar system together.

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 GRAVITYTHE HISTORY OF GRAVITY

Sir Isaac Newtontheorized the

Law of Gravitation in 1687

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UNIVERSAL LAW OF GRAVITATION

Gravity is greater when mass is largerand distance is shorter.

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There is an apple

on my head

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

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• 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

• 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

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