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Force and Motion

Key Vocabulary for Force and Motion

TermDefinition
motion an object's position changes when compared to another object
reference point a place or object used for comparison to determine whether something is in motion
force a push or a pull
newton the unit used to measure the strength of a force
friction a contact force that two surface exert on each other when they rub against each other
gravity a force that pull objects toward each other as a result of their masses
net force the combination of all forces acting on an object
speed the ____ of an object is the distance the object moves per unit of time; s=d/t
slope the angle of a line on a graph
velocity the speed at which an object travels in a given direction; for example: the storm is moving 25 km/h eastward
acceleration the rate at which velocity changes; (final speed - initial speed) / time
inertia an object's resistance to change
Newton's 1st Law of Motion law that states an object at rest will remain at rest, and an object that is in motion will keep moving (in a straight line) until acted upon by an outside force
Newton's 2nd Law of Motion law that states an object's motion depends on its mass; force = mass x acceleration
Newton's 3rd Law of Motion law that states that for every action there is an equal (in strength) but opposite (in direction) reaction
weight a measure of the force of gravity on an object
Created by: jbohannon