13 terms

# Physical Science Unit 8

#### Terms in this set (...)

Force
A push or pull that is exerted on an object.
Acceleration
How much the speed changes during a certain amount of time.
Mass
A measurement of how much matter is in an object.
Net Force
The total force on an object when all of the individual forces are added together.
Balanced Forces
Equal forces acting on an object in opposite directions.
Unbalanced Forces
Forces that produce a net force that is not zero. This also leads to an object changing its motion.
Friction
The force that one surface exerts on another when two surfaces are rubbed together
Air Resistance
The friction that objects experience when falling or moving through air.
Gravity
The force that pulls objects toward each other.
Weight
A measure of the force of gravity on an object.
Inertia
The tendency of an object to not want to change its current type of motion.
Action Force
The original push or pull of one object on another object
Reaction Force
The force that is equal in strength and opposite in direction to the action force (it happens at the same time as the action force).