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Gravity

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Atwubis Brine

on 22 January 2013

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Transcript of Gravity

Max Benjamin, Harrison Johnson, Arian Khadivi, Abigail Bergman, Katie Meyer, Vardan Gupta GRAVITY A force of attraction between all objects due to their masses. It exists everywhere in the universe All objects on Earth are pulled towards each other But Earth's massive gravitational force is the only one that is large enough to make a noticeable difference It takes a lot of force to overcome it Everything on or near Earth is pulled towards it's center Isaac Newton was the first to treat these questions as being related. He realized that the same force must be responsible for this and called the force Gravity. He summarized his ideas in The Law of Universal Gravitation.
It describes the relationship between mass, distance, and Gravity. -Objects with a small mass exert a small amount of gravitational force.
-Objects with a larger mass exert a greater amount of gravitational force Objects farther away exert a weaker gravitational force than objects that are close together Law Of Universal Gravitation
Free fall is when
only gravity is pulling
an object down without
air resistance which causes things to slow down, because air particles bump into objects. What is Terminal Velocity? Orbit An orbit is formed by two forces
-gravitational force
-the object's own motion
Objects in orbit are actually in free fall Free Fall For many years, people asked why do objects fall to the Earth and why do objects move in the sky? Air resistance is a force that opposes motion and acts on all objects that move through the air. Air Resistance gravity Air resistance 1 kg 7 kg Gravity pulls on things with different forces according to their mass but objects with greater mass resist movement due to inertia and so all objects accelerate at 9.8m/s/s. Acceleration Due To Gravity Gravity pulls on all objects, but as they fall, they accelerate. Terminal velocity is when an object being pulled down by gravity stops accelerating. This happens when the upward resistance of the fluid it is in matches the downward force of gravity making the net force 0. After this, inertia takes over and makes the object move at a constant speed downward. THE END
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