# Linear Motion POP I

Vocabulary Terms for Newton's Laws of motion and basic mechanics

## Terms

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- Mass
- The amount of matter an object contains.
- Displacement
- The distance from a reference point.
- Newton's First Law of Motion
- An object in motion will stay in motion and an object at rest will stay at rest until acted upon by an unbalanced force.
- Force
- A push or pull which acts on an object.
- Speed
- The change in distance over a period of time.
- Newton's Third Law of Motion
- For every force there is an equal and opposite force.
- Acceleration
- The change in an objects velocity over a period of time.
- Scalar
- A quantity which is only has a magnitude.
- Vector
- A quantity with both a magnitude and a direction.
- Velocity
- The change in displacement over a period of time.
- Distance
- The length, height or width of an object or between objects.
- g
- The acceleration due to gravity on Earth (9.8m/s²)
- Newton's Second Law of Motion
- The net force acting on an object is equal to the product of the objects mass and acceleration.
- Weight
- The gravitational force exerted on an object.
- Terminal Velocity
- The speed at which air resistance (drag) on a falling object equals the force of gravity on the object.