When the object changes position over time when compared to a reference point.
The speed of an object in a particular direction.
The rate at which an object moves.
The rate at which velocity changes. (This could also include slowing down because your velocity is changing.)
A simple push or pull.
The unit that is used to express force.
A force that results from combining all the forces exerted on an object.
A force that opposes motion between two surfaces that are touching.
The force of attraction between objects due to their masses.
The measure of gravitational force on an object.
The amount of matter in an object. (Mass is in everything; therefore mass IS everything.)