the unit of force

the forces acting on the object are not changing the motion or state of the object

forces acting on a system cause the system to start moving in the direction of the force

 the rate at which a distance is traveled

the speed of an object in a particular direction; changes if either its speed or its direction changes

the rate at which velocity changes over time

a way to visually describe the pushes or pulls exerted on an object

types of forces only acting between objects that are touching

 forces that can act at a distance

the sum of all the forces acting on the object

a force of attraction between objects due to their masses

a contact force that resists motion between two objects

the force that opposes the motion of objects through air

the amount of matter in an object

a measure of the pull of gravity on that object

a curved path that objects take around a star, planet, or moon

a change in an object’s position over time

describes an object’s location

an object that appears to stay in place

a set of objects that are all stationary with respect to each other

Unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in motion at a constant velocity

the acceleration of an object depends on the mass of the object and the amount of force applied

when one object applies a force to a second object, the second object applies an equal and opposite force to the first object

the tendency of an objects to resist any change in motion

 one factor increases with the same multiplier as the other factor

one factor increases when the other factor decreases

 the energy of motion

stored energy based on an object’s relative position within a system or its condition

an object that attracts, or pulls on, materials that contain iron

the push or pull exerted by magnets

areas where north poles of groups of atoms can line up in the same direction

materials that form magnetic domains

causes matter to experience a force when placed in an electromagnetic field

a force caused by an imbalance of electric charge

the force of attraction or repulsion between objects due to their charges

the area in which an object experiences a force that acts at a distance

a type of field model made up of arrows; the spacing between field lines indicates the strength of the field

the area surrounding an object in which another object is pulled toward the object

the area around a charged object in which another charged object is affected by the electric force

the area around a magnet in which magnetic forces affect magnetic objects

a continuous flow of electric charges from one region to another

device used to measure electric current

the interaction between electricity and magnetism

a long, straight coil of wire

 a coil of wire around an iron core

force generated on charges when a magnetic field changes near the electric charges

the ability to do work or to cause change in matter

the transfer of energy to an object by a force that causes the object to move in the direction of that force

energy stored in an object due to its physical position and the force of gravity acting on it

the sum of the object’s kinetic energy and potential energy; the energy of an object due to its motion and its position

 the total kinetic energy of all the particles that make up an object

the kinetic energy of electromagnetic waves, which include visible light, x-rays, and microwaves

kinetic energy caused by the vibration of particles in a medium, such as steel, water, or air

kinetic energy of moving electric charges

potential mechanical energy stored in an object when work is performed to change its shape

potential energy stored in the chemical bonds of substances; batteries, fuels, matches

potential energy stored in the nucleus of an atom

when two objects collide, each exerts a force on the other that can cause energy to pass from one to the other

 the change of one form of energy into another

 a set of interacting parts that work together

matter, energy, or information that enters a system

matter, energy, or information that leaves a system; the product of a system

states that energy is not created or destroyed