What is gravity????.

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Presentation transcript:

What is gravity????

Gravity Force of attraction between 2 objects with mass Every object in the universe is affected by gravity Two factors that affect gravitational forces Mass Distance

Which has a greater gravitational attraction? B

Which has a greater gravitational attraction? B

Galileo (1564-1642) Observed movements on the earth All objects accelerate as they fall Concluded that all objects, regardless of weight would fall at the same rate

Newton (1642-1727) Provided the explanation for the observation of the movements of the planets Three Laws of Motion 1st law: an object in motion will remain in motion unless another force acts upon it 2nd law: F=ma 3rd law: for every action there is an opposite and equal reaction

Einstein (1879-1955) Refined the concept of gravitational forces Space-time continuum Gravity is a function of space, time, energy and mass Weight= to the pull of gravity on a mass

Radiation

Magnetism Earth’s magnetosphere is a magnetic field that is created when the flow of electrical charges create two opposite ends/poles Protects the earth from too much radiation

Auroras As the earth’s magnetic field and solar radiation intersect, the molecules become ionized and give off light Van Allen radiation belt

How do forces impact our solar system?