A push or pull which may cause a change in an object's motion - force, a pulling force that acts against motion to slow down or stop things from moving - friction, forces that cause a change in an object's motion because they don't cancel each other out; net force is not zero - unbalanced forces, forces that cancel each other out because they are equal in size and opposite in direction; net force is zero - balanced forces, The sum of all forces acting on an object - net force, The measurement of change in an object's speed in a given direction - acceleration, A pulling force that exists between all objects that have mass; pulls objects on Earth - gravity, the tendency of an object to resist any change in its motion - inertia, The study of matter and energy and the interactions between the two through forces and motion. - physics, The pull between objects with opposite magnetic poles; A push between objects with magnetic poles facing the same way - magnetic force, a force that is put on an object by another object - applied force, An upward pushing force exerted by water - buoyancy, force that opposes the motion of objects that move through the air - air resistance, The measurement of the outer surface of an object. - surface area, A device that swings back and forth due to the force of gravity - pendulum,

Motion

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