Changes in Forces and Motion

Acceleration

The rate at which an objects velocity changes over time.

Direction

A property that describes the orientation or path of an object or force in space, often relative to a reference point or defined by cardinal directions.

Balanced Forces

When 2 or more forces action on an object are equal in all direction.

Unbalanced Forces

When 2 or more unequal forces action on a object.

Frame of Reference (Reference Point, Frame) 

A system that was coordinates or background objects to establish position or measure movement of a point in space.

Inertia

The tendency of an objects velocity changes resisting change in motion, remain unchanged.

Motion

The change in an objects position with respect to time and in comparison to the position of other objects used as an reference point.

Magnitude

Amount of strength of a force.

Net Force

The sum of all force acting in an object.

Newton’s Second Law of Motion

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Speed

The rate at which an object covers distance, without regard to direction.

Velocity 

The speed of something in a specific direction.