a measure of how much matter is in an object

A measurement of an object's speed and direction

The tendency of the motion of an object to remain constant for both speed and direction.

Forces acting in opposite directions in equal strength so there is no change in the speed of the object.

Forces that are not equal, causing a change in the motion of an object’s speed or direction.

Amount of force acting on an object.

forces on all sides are equal; net force= 0; an object’s motion will not change

The velocity of an object will remain constant unless a net force acts on it.

forces are not equal; net force does not equal zero; an object’s motion will change

the units used for force

the overall force on an object