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Force and Motion

Vocabulary terms for Force and Motion Unit

TermDefinition
Force A push or pull; something that changes the motion of an object
Acceleration The rate at which velocity changes over time
Gravity The force that objects exert on each other based on their masses and the distance between the objects
Inertia The tendency of an object to resist change in its speed or direction of motion
Balanced Force Equal forces acting on an object in opposite directions (results in no motion)
Friction The resistive force two objects exert on each other when they rub together
Distance Measurement of how far an object travels
Motion The state in which one object's distance from another is changing
Net Force The overall force on an object when all the individual forces acting on the object are added together
Unbalanced Force A nonzero net force, which changes the motion of an object
Velocity Speed in a given direction
Speed The distance an object travels in a unit of time
Weight The force of gravity on an object at the surface of a planet
Newton Unit of measurement for force; equal to force required to accelerate 1 kg of mass at 1 meter per second per second (1m/s²)
Newton's 1st Law of Motion (Law of Inertia) An object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted on by an outside (unbalanced) force
Newton's 2nd Law of Motion The net force on an object is equal to the product of its mass and acceleration (F=ma)
Newton's 3rd Law of Motion If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction (for every action there is an equal and opposite reaction)
Momentum the product of an object's mass and velocity
Created by: coachsteele