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# Forces & Motion

TermDefinition
Force A push or pull that acts on an object.
Inertia The tendency of an object to move in a straight line.
Gravity An attraction between the mass of the Earth and the mass of the object.
Weight The force of gravity on an object.
Friction A force that opposes the motion of one object moving past another
Newton's First Law of Motion An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Mass The amount of matter in an object
Balanced Forces Forces that are equal and opposite and produce no change in the motion on an object. Unbalanced Forces – Forces that produce change in the motion of the object in the direction of the greatest force.
Unbalanced Forces Forces that produce change in the motion of the object in the direction of the greatest force.
Acceleration A change in velocity, or the objects position and speed.
Velocity The speed and direction of an object.
Speed The distance an object moves in a specific time.
Net Force the total of all the forces acting on an object
Newton's Third Law of Motion For every action there is an equal and opposite reaction.
Newton's Second Law of Motion the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
Created by: msjorgenp

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