Gravity. GRAVITY DEFINED Gravity is the tendency of objects with mass to accelerate towards each...
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Transcript of Gravity. GRAVITY DEFINED Gravity is the tendency of objects with mass to accelerate towards each...
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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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