A rule that tells how or why something happens

A situation carefully set up to show what will happen under controlled conditions

The measure of the amount of matter in an object

An educated guess that predicts the relationship between variables

A push or pull, an action that has the ability to change motion

The metric unit of force

The rate at which speed increases

Speed with direction

An object in motion will stay in motion, and an object at rest will stay at rest unless acted on by an outside force

Acceleration is proportional to force and inversely proportional to mass 

9.8 m/sec or g

When an object is accelerating due to gravity alone, and no other forces are acting on it

The ratio of vertical change over horizontal change

Every action has an equal and opposite reaction

An object’s resistance to change in motion

A change in motion created by a force applied over time

If interacting objects in a system are not acted on by an outside force, the total amount of momentum in the system cannot change

The measurement for energy

The transfer of energy that results from applying a force over a distance

Energy due to position

The energy of motion

Energy can never be created or destroyed, only converted from one form to another

When two or more objects hit each other

When objects bounce off each other with no loss in the total kinetic energy of the system

 $v=\frac{d}{t}$  

 $a=\frac{F}{m}$  

 $a=\frac{v_2-v_1}{t}$  

p=mv

 $W=Fd$