Term Definition
motion
The state in which one object's distance from another is changing.
reference point
A place or object used for comparison to determine if an object is in
motion.
meter The basic SI unit of length.
speed The distance an object travels in one unit of time
velocity
Speed in a given direction.
force A push or a pull exerted on an object.
net force
The overall force on an object when all the individual forces acting on an
object are added together.
unbalanced force
A nonzero net force that changes an object's motion.
balanced forces
Equal forces acting on an object in opposite directions.
friction
The force that one surface exerts on another when the two rub against each
other.
acceleration The rate at which velocity changes.
linear The term used to describe the relationship between variables whose graph
is a straight line.
nonlinear
The term used to describe a relationship between variables whose graph is
not a straight line.