# data[].attributes.body
n (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=0ahUKEwjy_YvEkK_WAhVK0GMKHbA8AEAQFghdMAs&url=https%3A%2F%2Fwww.vocabulary.com%2Fdictionary%2Fgravitational%2520force&usg=AFQjCNHx4sWmYGYGDLTRkUVpvDXtCt19fQ Its the same thing as gavity .

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the quantity of motion of a moving body, measured as a product of its mass and velocity.
Momentum - Chrome Web Store - Google
Their is momentum on a roller ride.

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Projectile motion is a form of motion in which an object or particle (in either case referred to as a projectile) is thrown near the Earth's surface. Projectile motion - Wikipedia

https://en.wikipedia.org/wiki/Projectile_motion    The ball falls when you drop it.

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Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Friction - Wikipedia

https://en.wikipedia.org/wiki/Friction The two boxes are rubbing on each other.

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Discussion. definition. When the velocity of an object changes it is said to be accelerating. Acceleration is the rate of change of velocity with time.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwif8NbwjK_WAhUDz2MKHTsMDc0QFghjMA0&url=https%3A%2F%2Fphysics.info%2Facceleration%2F&usg=AFQjCNHHq6mdiNqgIJZmjYUdOBxeFWBloA    When u have acceleration is when you go down hill on a ride.

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a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwi4g6LYja_WAhUM3GMKHcJmC3wQFggzMAE&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FCentripetal_force&usg=AFQjCNGAG5z-VW8Tuj-Zeaq6tNGi5jkSOQ When you go in a circle really fast

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In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance. When you are in the air but gravity pulls you down .https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwivxLqWjq_WAhUByWMKHcR7BZ4QFggtMAI&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FDrag_(physics)&usg=AFQjCNGK3lWyhdmy2JDdb9pZPzpObPOXAg

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Gravity, or gravitation, is a natural phenomenon by which all things with mass are brought toward (or gravitate toward) one another, including planets, stars.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiMrI37jq_WAhUE5WMKHcefCMYQFgglMAA&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FGravity&usg=AFQjCNF0-qLSD1rZGzSTMBrfhwjQpdI2fg every thing will be pulled down.

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the rate at which someone or something is able to move or operate. The girl is running a faster speed then the other boy https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwju2d7Qj6_WAhUH8GMKHaN2Aa0QFgiKATAB&url=https%3A%2F%2Fwww.thoughtco.com%2Fspeed-2699009&usg=AFQjCNFvqjA75fSxsexTgjafU55CcupfWg