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# PS 3705

### Physical Science RS

TermDefinition
Motion Change in the position of an object over time.
Distance How far and object moves.
Displacement Distance and direction of an object's change in position from the starting point.
Vector A physical property that is specified by both a size and a direction.
Scalar A physical property that is specified by only a number (size).
Gravitational Force The attractive force between two object that is directly proportional to the mass of the objects.
Applied Force A force that is applied to an object by a person or another object.
Normal Force The support force exerted upon an object that is in contact with another stable object.
Friction Force The force exerted by a surface as an object moves across it or makes an effort to move across it.
Newton's First Law of Motion States that if the net force on an object is zero, then an object at rest remains at rest, or if the object is moving, it continues moving with constant velocity.
Newton's Second Law of Motion States that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass.
Newton's Third Law of Motion States that when one object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength in the opposite direction.
Action/Reaction Pairs A pair of objects that interact to produce a force on each other of equal magnitude but of opposite direction.
Kinetic Energy Energy a moving object has because of its motion.
Gravitational Potential Energy Energy stored by objects due to their position above Earth's surface.
Law of Conservation of Energy States that energy can never be created or destroyed.
Series Circuit Circuit in which electric current has only one path to follow.
Parallel Circuit Circuit in which electric current has ore than one path to follow.
Static Electricity The accumulation of excess electric charge on an object.
Insulator Material in which electrons are not able to move easily.
Conductor Material, such as copper wire, in which electrons can move easily.
Created by: missphysicsteach