Acceleration (A) - the rate at which an object changes its speed and direction over a given period of time. It is a vector quantity and is in terms of meters/second (m/s/s).

Action at a distance force - types of forces where objects interact, but not physically.

Air resistance force - a type of frictional force, but it acts on objects that travel through the air.

Applied force - a force that is exerted by an object to another.

Balanced and unbalanced forces - A balanced force is when two or more forces act on each other and counteract each out completely, which means that an object remains at rest. An unbalanced force is the forces that don't balance out and an object is pushed or pulled off their resting position.

Centripetal force - a force that pulls an object toward the center of a circle, causing it to go in circles.

Contact force - types of forces which objects interact physically resulting in a mutual push or pull.

Distance (d) - how far an object has gone when it was in motion. In terms of meters (m) and is a scalar quantity.

Displacement - how far an object has changed in position, is a vector quantity expressed in meters (m).

Elastic Collisions - when objects collide where there is no kinetic energy lost.

Energy - the ability to move or do work.

Force (F) - push or a pull that acts on an object. Expressed in the terms of Newton's (N).

Force friction - a force when a object moves across a surface being exerted.

Friction () - a force that resists the motion of an object.

G - unit of acceleration equal to the acceleration of gravity, which is 9.8 m/s/s.

Gravitational force - a force that attracts two objects with a mass to each other, the size of the force depends on the mass and the distance between the objects.

Inertia - tendency of an object to resist a change in the way they are already moving. The more an object weighs, the more force needed to move them or change their "inertia".

Kinematics - science that describes the motion of objects using numbers, graphs, diagrams, words, and equations.

Kinetic energy (KE) - energy that an object has because of its motion, the amount of kinetic energy depends on the object's mass and speed. Expressed in the terms of Joules (J).

Mass (m) - the measurement of the amount of material of an object, "amount of stuff". Expressed in grams (g).

Momentum (p) - a mass in motion, expressed in terms of kilograms meters per second (kg*m/s).

Net force - the sum of all forces which act on an object, forces are vectors.

Normal Force - the force that is exerted that supports an object in contact with another object that is stable.

Period (P) - the time that a motion takes to repeat itself in one complete cycle.

Physics - science that deals with matter, energy, and its interactions.

Potential energy (PE) - energy that an object can have because of its height above the ground (stored energy). Depends on mass and its height and is expressed in Joules (J).

Tensional force - the force transmitted through when a string is pulled tight at each end.

Scalar quantities - quantities in which describe only the magnitude, so scalar quantities are only positive.

Speed - how fast an object is moving, it is a scalar quantity.

Vector quantities - quantities in which describe both a direction and magnitude. Quantities can be both positive or negative. If it is negative, it has a direction to the left and positive quantities are to the right.

Velocity (V) - the speed and direction in which an object moves (vector quantity). Expressed in terms of meters per second squared (m/s).

Weight - the measurement of gravitation force acting on an object.

Weightlessness / zero gravity - sense of not weighing anything. Actually not feeling a external force acting on our bodies, nothing pushing us upward.