20 terms

# Unit 5 /Physics

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Acceleration
Change in velocity (speed or direction)
Air Resistance
A contact force that opposes the motion of objects moving in the air
Inertia
Resistance of an object to a change in its motion
Law of Acceleration (2nd Law)
Force is mass times its acceleration
Law of Action-Reaction (3rd Law)
For every action there is an equal and opposite reaction
Law of Inertia (1st Law)
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force
Net Force
The combination of all forces acting on an object
Speed
Distance an object travels per unit of time
Velocity
Distance an object travels per unit of time and the direction it is traveling
Balanced Force
Do not cause a change in motion; equal in size and opposite in direction; cancel each other out
Differentiate
Distinguish, tell apart, and recognize differences between two or more items.
Force
A push or pull exerted on an object
Friction
A force that opposes motion between two surfaces that are in contact
Kinetic Energy
Energy that an object has due to its motion
Limitation (of a model)
A limitation of a model in science is that they are usually simplified versions of the real situation of concept
Mass
A measure of the amount of matter in an object
Motion
An object's change in position relative to a reference point.
Potential Energy
Stored energy that results from the position or shape of an object
Unbalanced Force
Forces that have a net force that is not zero (object will move)
Work
Force exerted on an object that causes it to move