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Motion

Force and Motion

Vocabulary TermDefinition
motion An object's change in position over time when compared with a reference point.
speed The rate at which an object moves; speed depends on the distance traveled and the time taken to travel that distance.
acceleration The rate of change in speed or velocity. An object accelerates if its speed changes, if its direction changes, or if both its speed and its direction change.
force A push or a pull that acts on an object.
momentum An object in motion will continue its movement until a force acts on it.
distance How far it is between two points.
gravity An invisible force of attraction between objects that is due to their mass.
mass The amount of matter that something is made of; its value does not change with the object's location in the universe.
Newton A famous scientist who studied and explained many of the forces of nature. His ideas include the three laws of motion.
Created by: silverrocks on 2004-02-04



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