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the rate at which velocity changes; an object accelerates if its speed and / or direction changes. Acceleration may be postitive(increasing) or negative (decreasing)

Centripital Force

the accelration of an object in a circular motion


a push or a pull

Balanced force

forces acting on an object that cause the net force to be zero

unbalanced force

forces acting on an object that cause the net orce to be greater than zero


the attractive force between two objects proportional to gravity


the tendency of all objects to resist any change in motion (start or stop)


the amount of matter in an object

milky way galaxy

our solar system is part of this galaxy. It contains single stars , double stars, asteroids, meteors, and gas and dust.It is an elliptical shape.


an objects change in position over time when compared with a reference point

newton's laws of motion

1an object in motion will remain in motion or an object at rest will remain at rest unless acted upon by an outside force.
2the accelaration of an object is equal to the mass of that object and the force applied
3 for every action force there is an equal and opposite reaction force.


the SI unit of force.


the path of an object as it revolves around another object


the movement of an object around another object


the spinning motion of a planet about its axis


the rate at which an object moves(S=d/t) Speed=distance/time

straight line motion

motion in a straight line


any object that revolves around another object in space.


the daily rise and fall of earth's waters on shores


a measure of the gravitational force on an object


the action that results form doing something (W=fxd) Work =force times distance
work is equal to the force applied multiplied by the distance an object is moved

conservation of momentum

the total momentum of the two objects before the collsion is equal to the total momentum of the two objects after the collsion . That is, the momentum lost by object 1 is equal to the momentum gained by object 2


sliding, rolling, fluid, static

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