force acting on an object such as pushes and pulls

forces acting on an object within a system that cancel each other out, providing a net force of zero on an object within the system; will not cause a change in motion or cause acceleration

a push or a pull on one object by another object that is touching it

a push or pull between two objects

the forces two objects apply to each other

diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation

a force that opposes relative motion between systems in contact

a physical phenomenon where masses exert a pull on each other from a distance; the objects are pulled toward each other's center of mass

a type of physical phenomenon that includes the attraction between iron and a magnet; exhibited by both magnets and electric currents; a type of energy characterized by fields of force

numerical size of a quantity

when an object applies a force on another object, the second object applies a force of the same strength on the first object, but the force is in the opposite direction

a force that one object can apply to another object without touching it

the force that a surface applies to an object that it is in contact with, preventing the object from passing through the surface; acts perpendicular to the surface on which the object rests and is equal in magnitude to the force of the object on the surface

detectable events that are observed through the senses or technology; can be explained through scientific laws, ideas, principles, and theories

regularly interacting or interdependent group of items forming a unified whole

forces acting on an object within a system that do not cancel each other out or add up to zero, producing a net force; will cause acceleration (a change in motion) in the direction of the unbalanced force