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Physics Vocabulary

8th Grade Science Unit 2

TermDefinition
Acceleration The change in an object’s speed or direction (velocity) over time.
Balanced Force When all forces acting on an object are equal and opposite.
Constant velocity When the velocity of an object does not change. The graph is a straight line.
distance The total length traveled.
Force A push or pull.
Friction The force that resists the motion of two surfaces that are touching.
Gravity The force of attraction between two objects.
Inertia An object’s tendency to resist changing its motion.
Kinetic Energy The energy of motion.
Law of Action-Reaction For every action, there is an equal and opposite reaction.
Law of Force & Acceleration F=ma. There is a relationship between force, mass, & acceleration. If you increase the acceleration, then the force increases.
Law of Inertia An object at rest will remain at rest, and an object in motion will remain in motion, unless acted upon by an unbalanced or outside force.
mass The amount of matter in an object.
Motion A change in position.
Net Force The total amount of force acting on an object.
Newton The SI unit of force. Measured with a spring scale.
Potential Energy Stored energy due to gravity, elastic, or chemicals. Also called positional energy.
Speed The distance traveled by an object in an amount of time.
Unbalanced Force When all forces acting on an object are not equal or not opposite.
Velocity Speed with a direction. Velocity has a unit of m/sec and a direction.
Work Force needed to move an object a distance (when both the force and the motion of the object are in the same direction).
Created by: kara.mabele
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